Campbell-Walsh Urologyby A. J. Wein, L. R. Kavoussi, A. C. Novick, A. W. Partin, C. A. Peters. This is the bible of the field. In med school, use it as a reference text when asked to lookup specific topics, for researching presentations, etc. A strong resident will have read this cover to cover (more than once. . .).
Glenn's Urologic Surgeryby Sam D Graham, Thomas E Keane, James F Glenn is a recently updated, excellent text. A surgical atlas is a must have text during residency. If you get one during medical school it could help you significantly during your sub-I. By spending 30 minutes reading the night before the operation, you will look like a star when attendings and residents pick your brain during the surgery.
Smith's General Urologyby E. A. Tanagho, J. W. McAnich. This text is a very comprehensive overview of urology and is probably the basic text most commonly used by both students and residents. It is a good textbook for medical students to try to finish before beginning a sub-I. It also serves as a good intro book to read during your general surgery internship.
Clinical Manual of Urologyby P. M. Hanno, S. B. Malkowicz, A. J. Wein. The pocket-sized volume serves as a fantasticreference manual for both the clinics and the wards. This text can easily substitute for Smith's. Whether you need a quick refresher course on renal cell carcinoma before a case or trying to figure out how to free penile skin from a zipper in the ER--this text will bail you out. Certainly a must for every resident. This new edition came out in May 2007 as a companion text to Cambell's.
Urology Secretsby M. I. Resnick, A. C. Novick. If you cannot get through Smith's General Urology or Clinical Manual of Urology, consider reading this book cover to cover. This is a very comprehensive text in quite readable Q&A format that is useful for both pre-rotation reading and for quick topic review
Pocket Guide to Urology by Jeff Wieder, MD -- a handbook for medical students, residents, and practicing urologists. This is an excellent book for in-service/boards review.
Atlas of Urologic Surgeryby F. Hinman and P. H. Stempen is a bit more dated than Glenn's Urological Study but could be a nice addition to your library.
(A surgical atlas is a must have text during your Sub-I. By spending 30 minutes reading the night before the operation, you will look like a star when attendings and residents pick your brain during the surgery.)