Probably the most underrated text in our profession is The Diabetic Foot by Veves, Giurini, and LoGerfo. Aparently there is a paperback edition on amazon for a a rather inexpensive price, though your campus library should be closed down if they don't have a copy. Ch 16 on local wound care is well organized and a good starting point if you want to learn about different dressings. It's also highly relevant to the clinician, in contrast to some of the other chapters on pathophysiology.