Reviews of books on category theory in c.s.

A year or two ago someone wrote a comparative review of several books in the area of category theory in computer science. I would appreciate finding out where it is available. Thanks, Charles Wells, Department of Mathematics, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106-7058, USA. EMAIL: charles@freude.com. OFFICE PHONE: 216 368 2893. FAX: 216 368 5163. HOME PHONE: 440 774 1926. HOME PAGE: URL http://www.cwru.edu/artsci/math/wells/home.html "In theory, there is no difference between theory and practice, but in practice, there is."