The “Contract Law Selected Source Materials Annotated 2020 Edition” is a comprehensive textbook published by West Academic on the subject of law, specifically focusing on contracts. Authored by Melvin A. Eisenberg and Steven J. Burton, this textbook is designed for advanced adult education and further education levels. The 2020 edition includes annotations and is part of the Selected Statutes Series, providing a valuable resource for those studying contract law in the United States.