I was thumbing through my referfences on another research project when I came across J.L. Ludlow's Manual of Examinations. (I'd forgotten I'd bookmarked it, and now I remember why I did.) The book is written for students of medicine (which am all of us, to a degree). It's set up in a question-and-answer format for different conditions - disease, surgery, OB-GYN, urology, and so on. The questions are in plain English, and the answers are concise and to the point, without having to wade through pages of pontifications on the finer points of inflammation or the latest theory du jour. The last few pages also have a medical formulary - common medicines, typical dosages, and for what they are used.
Advanced titles with which we as doctors would be familiar is the fifth edition of George Woods' Treatise on the Practice of Medicine, which is an advanced intro into the latest theories of disease being descended from various inflammations (or so I think that's how it reads; I could be wrong).
On the surgical side is John Erichsen's Art and Science of Surgery. This is THE reference to read regarding surgical procedures on whatever, and to prove to the dense morons out there that there were other treatment options besides amputation. The discussion on tumors and cancer is particularly fascinating.