The Handbook on Inheritance Law provides a comprehensive and detailed analysis of the compulsory portion law, which plays a central role in inheritance law. It is aimed at professionals and interested parties who wish to engage with the complex aspects of compulsory portion law. The work begins with the theoretical foundations and then addresses the practical implications of compulsory portion law on contract and will design. It also discusses the role of lawyers in preventive and procedural activities, as well as the tax implications of compulsory portion law. Special attention is given to international private law and comparative law, making the handbook a valuable resource for legal professionals and students. The 6th edition has been thoroughly updated to reflect the latest legal developments, including reforms in guardianship and care law, as well as changes brought about by the MoPeG.