This textbook introduces the civil law component of commercial private law, covering topics from contract formation to consumer private law and specific obligations such as purchase, rental, or suretyship. It also teaches the fundamentals of legal case processing. Short learning units, clear didactic modules, and accompanying assessments ensure sustainable knowledge transfer. The book is aimed at anyone dealing with issues of commercial law in the context of their education and training (including as a minor) as well as in their professional practice.