Patent law and social policy under the TRIPS Agreement, Baden-Baden 2002.

The Implementation of the Doorstep Selling Directive in the Member States, Baden-Baden 2000.

European Consumer Law, 2nd ed., Antwerp 2014, with Norbert Reich, Hans-W. Micklitz and Klaus Tonner.

Collective Legal Protection in Capital Market Law - Evaluation of the Capital Investor Model Case Act, Frankfurt 2010, with Axel Halfmeier and Eberhard Feess.

Understanding EU Consumer Law, Antwerp 2009, with Norbert Reich and Hans-W. Micklitz.

Consumer Protection through Injunctions, Baden-Baden 2007, with Hans-W. Micklitz, Ulrike Docekal and Peter Kolba.

Consumer Loan Agreement, in: Marina Tamm/Klaus Tonner/Tobias Brönneke (eds.), Consumer Law, 3rd ed., Nomos, 2019, 784-845.

Injunctions Act, in: Thomas Rauscher (ed.), Münchener Kommentar zur Zivilprozessordnung, vol. III, 5th ed., Munich 2017, with Hans-W. Micklitz.

Consumer protection, in: Manfred Dauses (ed.), Handbuch des Europäischen Wirtschaftsrechts, new edition 34th ed., Munich 2013, H. V., with Hans-W. Micklitz.

§§ Sections 312 to 312f, 346 to 359 BGB, in: Klaus Tonner/Armin Willingmann/Marina Tamm (eds.), Contract Law, Neuwied 2009.

European Union Law, in: Sir Roy Goode (ed.), Consumer Credit Law and Practice, since the 30th ed., London 2009 (currently 44th ed. 2014).

Directive 98/27/EC on injunctions for the protection of consumers' interests, in: Eberhard Grabitz/Meinhard Hilf/Manfred Wolf (eds.), Das Recht der Europäischen Union, Vol. III, 29th ed., Munich 2006, A 25, with Hans-W. Micklitz.

Certification - Trust, Accountability, Liability, Dordrecht and others, 2019.

Online Mediation Platforms in Legal Practice, Baden-Baden 2018, with Klaus Tonner.

Varieties in European Economic Law - Liber amicorum for Hans Micklitz, Dordrecht et al. 2014, with Kai Purnhagen.

Liability Law in the Third Millennium - Liber Amicorum Gert Brüggemeier, Baden-Baden 2009, with Aurelia Colombi Ciacchi, Christine Godt and Lesley Jane Smith.

The Future of Consumer Credit Regulation: Creative Approaches to Emerging Problems, Aldershot 2008, with Michelle Kelly-Louw and James P. Nehf.

Access and Exclusion as a Subject of Private Law, Jahrbuch junger Zivilrechtswissenschaftler 2005, Stuttgart 2006, with Axel Halfmeier, Aurelia Colombi Ciacchi, Olaf Deinert, Tina Kolle and Sandy Thalheim.

Towards digital fairness, EuCML 2024, 24-30, with Hans-W. Micklitz, Natali Helberger, Betül Kas, Monika Namysłowska, Laurens Naudts, Marijn Sax and Michael Veale.

The prosumer in energy law - first needs a photovoltaic system or a wind turbine, VuR 2023, 443-446.

Improvement, dilution or more of the same? - On the new regulation of EU consumer credit law, VuR 2022, 283-292.

Effectiveness of consumer law, Revista de Direito do Consumidor 140 (2022), 123-146.

The Accessibility Act - Part 1: Conceptual foundations, Part 2: Civil law legal protection, Part 3: Collective civil law legal protection, specialist articles E6-2021, E7-2021 and E8-2021 at www.reha-recht.de.

Rights of persons with disabilities under the new Rail Passenger Rights Regulation, technical article E1-2021 at www.reha-recht.de

Small loans via online platforms, BKR 2021. 453-459.

Obstacles to Legal Tech Services: Examples from Germany and Estonia, EuCML 2021, 101-108, with Karin Sein.

The Digitalisation of Cars and the New Digital Consumer Contract Law, Journal of Intellectual Property, Information Technology and E-Commerce Law 2021, 156-168.

Powerful private players in the digital economy: between private law freedoms and the principle of equality, Baltic Yearbook of International Law 2020, 32-51.

Compensation for Vaccination Damage under German Social Security Law, Otago Law Review 2020, 199-217.

More legal certainty for legal tech debt collection through the BGH's Mietpreisbremsen judgement, WuM 2020, 185-191.

Theses on the implementation of consumer protection law by BaFin, WM 2019, 1189-1196.

Regulating certification bodies in the field of medical devices: The PIP breast implants litigation and beyond, European Review of Private Law 2019, 403-428, with Carola Glinski.

Law enforcement through legal tech debt collection using the example of the rent brake - benefit or danger for consumers?, VuR 2018, 443-447.

The role and liability of certification organisations in transnational value chains, 23 Deakin Law Review (2018), 83-118, with Carola Glinski.

Bundling contracts from a consumer law perspective, GRUR Int. 2018, 1010-1020.

New Deal for Association Claimants?, Journal of Consumer Law (VbR) 2018, 136-141, with Axel Halfmeier.

Representative action with teeth? - On the proposal for a directive on representative actions to protect the collective interests of consumers, VuR 2018, 243-250, with Axel Halfmeier.

Consumer ADR in Germany, EuCML 2018, 121-125.

Remedies for Damage Caused by Vaccines: A Comparative Study on Four European Legal Systems, European Review of Private Law 2018, 57-95, with Eleonora Rajneri, Jean-Sébastien Borghetti and Duncan Fairgrieve.

Directors' Duties and Corporate Social Responsibility under German Law - Is Tort Law Litigation Changing the Picture?, Nordic Journal of Commercial Law 2017, 11-27.

Data protection law as consumer law - How consumer organisations can contribute to the enforcement of data protection law, EuCML 2017, 113-119.

Obligations and liability of the "notified body" for high-risk medical devices, NJW 2017, 1146-1148.

The consumer associations' claim to remedy the consequences, Zeitschrift für Verbraucherrecht (VbR) 2016, 172-176.

The IPR of the consumer association action, EuZW 2016, 733-736.

Claims Management Services - An Alternative to ADR?, European Review of Private Law 2016, 143-160.

The basic account according to the draft of the Payment Accounts Act, VuR 2016, 3-9.

Energetic refurbishment versus social protection: On the interplay of tenancy law and SGB II, Soziales Recht 2015, 86-98, with Sabine Knickrehm.

Supply Chain Liability of Multinational Corporations?, European Review of Private Law 2015, 415-436, with Vibe Ulfbeck.

The "average consumer" - an obsolete model in the face of personalised marketing?, VuR 2015, 163-167.

The liability of the certification body in product safety law, ZEuP 2015, 192-210, with Carola Glinski.

The new Real Estate Credit Directive 2014/17/EU and its impact on German law, BKR 2015, 8-14.

Consumer protection through credit scoring, EWS 2014, 201-204.

The adjustment of long-term supply contracts - Experience from German gas price case law, European Review of Private Law 2013, 717-745.

A plea for special treatment of financial services in unfair commercial practices law, euvr 2013, 61-68.

Legal terminology - One Reason for Frictions between German and European Consumer Law, European Review of Private Law 2012, 1353-1368.

More coherence? A higher level of consumer protection? - A review of the new Consumer Rights Directive 2011/83/EU, European Journal of Consumer Law 2012, 371-390.

Liberalisation and protection of vulnerable customers in services of general interest, Europarättslig Tidskrift 2011, 483-502.

Credit scoring: Preventing consumer protection by assigning it to public law?, VuR 2011, 163-169, with Evelyne Terryn and Christian Twigg-Flesner.

The Proposal for a Directive on Consumer Rights: No Single Set of Rules, ZEuP 2009, 456-488, with Evelyne Terryn.

Dark patterns in consumer law, in: Maria Reiffenstein/Beate Blaschek (eds.), Konsumentenpolitisches Jahrbuch 2023, Verlag Österreich 2023, 181-202.

The implementation of Directives (EU) 2019/770 and 2019/771 in Germany, in: Matthias Baumgärtel/Gerd Kiparski (eds.), DGRI Yearbook 2021/2022, Otto Schmidt Verlag 2023, 335-350.

A Universal Service Framework for Powerful Online Platforms, in: BEUC (ed.), European Consumer Protection 2.0, www.beuc.eu/publications/beuc-x-2021-018_eu_consumer_protection.0_0.pdf, 2021, 146-207, with Orla Lynskey.

Personalised Pricing and Personalised Commercial Practices, in: BEUC (ed.), European Consumer Protection 2.0, www.beuc.eu/publications/beuc-x-2021-018_eu_consumer_protection.0_0.pdf, 2021, 92-145, with Orla Lynskey and Hans-W. Micklitz.

Product liability in the age of digitalisation, in: Anja Hentschel/Gerrit Hornung/Silke Jandt (eds.), Mensch - Technik - Umwelt: Verantwortung für eine sozialverträgliche Zukunft, Festschrift für Alexander Roßnagel, Nomos, 2020, 639-657.

Using claims management as a method to help vulnerable consumers, in: Christine Riefa/Severine Saintier (eds.), Vulnerable Consumers and the Law: Consumer Protection and Access to Justice, Routledge, 2020, 226-243.

Study on the collective enforcement of consumer claims in Germany, in: BMJV (ed.), Instrumente der Rechtsdurchsetzung im Verbraucherschutz - Ein rechtsvergleichender Blick auf Deutschland, China und Brasilien, Berlin 2020, 2-37.

Age and consumer protection, in: Kirsten Aner/Ute Karl (eds.), Handbuch Soziale Arbeit und Alter, 2nd ed., Springer, 2020, 337-347.

Deficient Standards by European Standardisation Organisations: Between State Liability and Tort Liability, in: Mariolina Eliantonio/Caroline Cauffmann (eds.), The Legitimacy of Standardisation as a Regulatory Technique in the EU, Edward Elgar, 2020, 131-155, with Carola Glinski.

Consumer law enforcement in the area of financial services, in: Tobias Brönneke/Andreas Willburger/Sabine Bietz (eds.), Verbraucherrechtsvollzug, Nomos, 2020, 89-108.

Dynamic and personalised prices between contractual freedom and arbitrariness, in: Jörn Lamla/Thomas Hess/Carsten Ochs/Michael Friedewald (eds.), Die Zukunft der Datenökonomie, Springer, 2019, 285-305.

A Consumer Perspective on Algorithms, in: Lucila de Almeida/Marta Cantero Gamito/Mateja Durovic/Kai Peter Purnhagen (eds.), The Transformation of Economic Law, Hart Publishing 2019, 43-63.

Certification of Medical Devices - Lessons from the PIP Scandal, in: Peter Rott (ed.), Certification - Trust, Accountability, Liability, Dordrecht and others, 2019, 189-211.

Consumers and services of general interest, in: Geraint Howells/Iain Ramsay/Thomas Wilhelmsson (eds.), Handbook of Research on International Consumer Law, 2nd ed., Cheltenham 2018, 267-307, with Chris Willett.

The EU Legal Framework for the Enforcement of Consumer Law, in: Hans-W. Micklitz/Genevieve Saumier (eds.), Enforcement and Effectiveness of Consumer Law, Dordrecht et al. 2018, 249-285.

The contractual position of the online platform operator as an intermediary, in: Peter Rott/Klaus Tonner (eds.), Online-Vermittlungsplattformen in der Rechtspraxis, Baden-Baden 2018, 62-80.

The contribution of consumer protection by BaFin?, in: Eva Kocher/Doris Neuberger/Luca Ulbricht (eds.), Festschrift für Udo Reifner, 2018.

Consumer protection in the "Sharing Economy", in: Christoph Brömmelmeyer/Martin Ebers/Mirko Sauer (eds.), Innovative Thinking between Law and the Market, Festschrift for Hans-Peter Schwintowski, 2017, 476-495.

Legal clarity, law enforcement and consumer law, in: Hans-W. Micklitz/Gesche Joost/Lucia Reisch/Helga Zander-Hayat (eds.)Verbraucherrecht 2.0 - Verbraucher in der digitalen Welt, Baden-Baden 2017, 221-264.

Legal Tech from a consumer perspective, in: Walter Blocher/Dirk Heckmann/Herbert Zech (eds.), DGRI Yearbook 2016, Cologne 2017, 111-132.

Regulatory enforcement in the UK, the Netherlands and the US, in: Hans Schulte-Nölke (ed.), Neue Wege zur Durchsetzung des Verbraucherrechts, Berlin et al. 2017, 31-83.

Eventfulness and legal development in consumer policy since the 1970s - A historical and Law approach to dealing with crises and scandals, in: Christian Bala et al. (eds.),Verbraucher in Geschichte und Gegenwart: Wandel und Konfliktfelder in der Verbraucherpolitik, Düsseldorf 2017, 187-207, with Claudius Torp.

Unfair Contract Terms, in: Christian Twigg-Fiesner (ed.), Research Handbook on EU Consumer and Contract Law, Cheltenham 2016, 287-313.

Insufficient Prevention of Overindebtedness - Legal and Policy Failures, in: Federico Ferretti (ed.), Comparative perspectives of Consumer Over-indebtedness - A view from the UK, Germany, Greece, and Italy, The Hague 2016, 189-205.

Art. 76: The 'Stick to the Language' Rule, in: Aurelia Colombi Ciacchi (ed.), Content and Effects of Contracts - Lessons to Learn from the Common European Sales Law, Dordrecht et al. 2016, 255-267.

The Low-Income Consumer in European Private Law, in: Kai Purnhagen/Peter Rott (eds.), Varieties of European Economic Law - Liber amicorum for Hans Micklitz, Doordrecht et al. 2014, 675-692.

Towards a Common European Sales Law, in: Daniela Heid/Rüdiger Stotz/Arsène Verny (eds.), Festschrift für Manfred A. Dauses, Munich 2014, 337-349.

The Court of Justice's Principle of Effectiveness and its Unforeseeable Impact on Private Law Relationships, in: Stephen Weatherill/Dorota Leczykiewicz (eds.), The Involvement of EU law in Private Law Relationships, Oxford 2013, 181-198.

Effective Enforcement of Consumer Law: The Comeback of Public Law and Criminal Law, in: James Devenney/Mel Kenny (eds.), European Consumer Protection: Theory and Practice, Cambridge 2012, 64-81.

Services of general interest, contract law and the welfare state, in: Jacobien Rutgers (ed.), European Contract Law and the Welfare State, Groningen 2012, 79-103.

Kickback payments under MiFiD: Substantive or procedural standard of unconscionability?, in: Mel Kenny/James Devenney/Lorna Fox O'Mahoney (eds.), Unconscionability in European Private Financial Transactions: Protecting the Vulnerable, Cambridge 2010, 326-349, with Axel Halfmeier.

Collective actions by consumer organisations in Germany, in: Matthias Casper/André Janssen/Petra Pohlmann/Reiner Schulze (eds.), Auf dem Weg zu einer europäischen Sammelklage?, Munich 2009, 259-275.

Cross-border collective damage actions in the EU, in: Fabrizio Cafaggi/Hans-W. Micklitz (eds.), New Frontiers of Consumer Protection: The Interplay between Private and Public Enforcement, Antwerp 2009, 379-398.

Verbraucherpolitischer Handlungsbedarf bei Legal Tech?, report commissioned by the Federation of German Consumer Organisations, 2023, here.

The Regulatory Gap: Consumer Protection in the Digital Economy, report commissioned by Bureau européen des unions de consommateurs (BEUC), 2021, www.beuc.eu/publications/beuc-x-2021-116_the_regulatory_gap-consumer_protection_in_the_digital_economy.pdf, with Natali Helberger and Hans-W. Micklitz.

Legal part of the study "Evaluierung der Entwicklungen im Bereich der Kreditwürdigkeitsprüfung bei Immobiliar-Verbraucherdarlehensverträgen", conducted by Institut für Finanzdienstleistungen e.V. Hamburg (iff) on behalf of the Federal Ministry of Justice and Consumer Protection, 2021, www.bmjv.de/SharedDocs/Downloads/DE/Fachinformationen/Abschlussbericht.pdf?__blob=publicationFile&v=2, with Petra Buck-Heeb and Claire Feldhusen.

Legal part of the study to prepare the evaluation of the General Product Safety Directive by Civic Consulting for the European Commission, DG Growth, 2021, available at ec.europa.eu/info/sites/default/files/study-part1-evaluation_gpsd_2.pdf.

A Universal Service Framework for Powerful Online Platforms, report commissioned by Bureau européen des unions de consommateurs (BEUC), 2020, with Orla Lynskey.

Personalised Pricing and Personalised Commerical Practices, report commissioned by Bureau européen des unions de consommateurs (BEUC), 2020, with Orla Lynskey and Hans-W. Micklitz.

Country report Germany of the study to prepare the report on the implementation of the General Product Safety Directive by Civic Consulting for the European Commission, DG Growth, 2020, available at ec.europa.eu/info/sites/default/files/publication_of_part_2_country_reports_annexed_to_the_gpsd_implementation_study.pdf.

Chapter "Rights and redress" of the study "Ex-post evaluation of the Consumer Programme 2007-2013 and mid-term evaluation of the Consumer Programme 2014-2020" by Civic Consulting for the European Commission, DG Justice, 2018.

Study on the collective enforcement of consumer claims in Germany on behalf of GIZ, 2018.

Reform of the Injunctions Directive and compensation for consumers, report commissioned by Bureau européen des unions de consummateurs (BEUC), 2018, with Axel Halfmeier.

Overall report on injunctions as part of the study "Study for the Fitness Check of consumer and marketing law" by Civic Consulting for the European Commission, DG Justice, 2017.

Expert opinion on the development and evaluation of open questions and challenges of German consumer law policy in the 21st century for the Expert Council for Consumer Affairs at the Federal Ministry of Justice and Consumer Protection, 2016.

Regulatory enforcement of consumer protection in the UK, the Netherlands and the USA, report for the Federal Ministry of Justice and Consumer Protection, 2016.

Country report Germany of the study "Study evaluating the status quo and the legal implications of third party liability for the European security industry", conducted by the European Centre of Tort and Insurance Law (ECTIL), Vienna, on behalf of the European Commission, 2013.

Comparative law section and country report Germany of the study "Study on the application of Directive 2005/29/EC on Unfair Commercial Practices in the EU" for Civic Consulting on behalf of the European Commission, DG Justice, 2012.

Country Report Germany of the study "Digital Content Services for Consumers", conducted by the Centre for the Study of European Contract Law (CSECL) and the Institute for Information Law (IViR) of the University of Amsterdam on behalf of the EU Executive Agency for Health and Consumers, 2010, full study.

Extension of the Proposed Consumer Rights Directive to Cover the Online Purchase of Digital Products, study commissioned by the Bureau européen des unions de consommateurs (BEUC), 2010.