The Aspen Casebook: Problems and Materials on Payment Law, authored by Stephen M. McJohn and Douglas J. Whaley, is a comprehensive textbook focusing on payment law in the business, economics, and legal education sectors. Published by Wolters Kluwer Legal & Regulatory U.S., this 11th edition book covers commercial, general legal, accounting, and investment topics. With a length of 10 inches and 608 pages, this book provides valuable insights and practical examples for students and professionals interested in payment law.