Professor Aigler notes that other works on the subject have appeared in the past year, such as a collection of cases on contracts in the American Casebook Series by Professor Corbin and the new edition of Williston's Cases on Contracts. He feels that law teachers may be particularly interested in the notes, which "... are copious, are very interesting, and valuable." His verdict: "How well Professor Costigan's book will work out as the basis of instruction only actual use can tell. A careful examination of the book, however, has satisfied the reviewer that it would be interesting to try it."
Aigler, Rakph W. Review of Cases on Contracts, by G. P. Costigan. U. Pa. L. Rev. 71, no. 1 (1922): 95–96.