The "Law of obligations" from Fikentscher (general and special section in a volume) had already reliably accompanied many generations of law and economics students into their exams. In the 10th edition, Wolfgang Fikentscher and Andreas Heinemann together provide for the first time the revision of the work. The new edition took into consideration particularly the radical changes, which were prompted by the law of obligations reform. The didactic objective of the work still remains to offer a thematically complete and systematic description of the entire law of obligations to students. With this, the work also looks at references to commercial and economic law, which are added by comparative law points of view. With the 10th edition, the standard work on the law of obligations is again updated. It considers legislation, administration of justice and literature up to Spring 2006.