Some course specific recommendations-
Anatomy: Core Concepts (Stern's book), Netter and a dissection atlas.
Biochem: Lippincott ONLY
Physio: Costanzo's text on physio (was purple, and I'm not referring to her BRS physio) and also use the BRS version (good for step I), and the syllabi
Neuro: High Yield neuroanatomy, BRS neuro, the syllabus, an atlas that contains cross sectional slices of the brain
IHB: ONLY buy BRS for this course. DO NOT purchase that text they tell you to get for heaven's sake.
ICM: Bate's. DO NOT BUY Dr. Coulehan's touchy feely book on how to interact with patients.
Path: Robbin's- I bought the huge Robbin's and baby Robbin's, and I never regretted doing so. Also, buy Robbin's question book. This book is very useful. I would also highly recommend purchasing
Medical Microbiology and Immunology: Examination and Board Review. This book is excellent (I still use it) and the immuno section is all you need for the immunology component of path. Also, buy BRS's path book and use it while taking path. It will help you so much when you are reviewing for step I.
That is all I remember now. Please ask me more specific questions if you want more info