Douglas Whaley is a Professor Emeritus at the Mortiz College of Law, The Ohio State University, from which he retired in 2004. His specialty is commercial law, for which he has writen seven casebooks (all published by Aspen Publishers), three Gilbert's Summaries of the Law, and recorded four lectures for the Sum and Substance CD Series. Whaley has been given nine awards for outstanding teaching from three different law schools.

After retiring from teaching, Whaley wrote a novel called "Imaginary Friend," which is an atheist thriller (new genre). He is immodestly proud of the novel, which is available on Amazon.com. Late in 2009 he started a blog after having a heart transplant(!); it can be found at http://douglaswhaley.blogspot.com/

Convenient and effective Sum and Substance audio series presents the essentials of contract law in a clear, succinct, time-saving format. Includes quick reference indexing, allowing you to quickly locate all topics in the recording, and informed exam tips to maximize your performance. Sections discuss: offer and acceptance, consideration, definition, sufficiency, adequacy, forbearance, past consideration, preexisting-duty rule, payment-in-full checks, promissory estoppel, statute of frauds, parole evidence rule, mistake, fraud, duress, undue influence, illegality, incapacity, unconscionability, impossibility, conditions and promises, anticipatory repudiation, third-party beneficiaries, assignment and delegation, and remedies.