Atlas Diseases of the Kidney

The Complete Herbal by Nicholas Culpeper
http://www.bibliomania.com/2/1/66/113/frameset.html (Link not functioning 3/7/2014)

Free Books 4 Doctors
Over 300 e-books, either downloadable as pdfs or linked to at the publishers' websites.

Google Books
This site is useful for its full text search of a large number of books. You can usually read small portions of the book (including the snippet of your search term) and then, if you find it relevant, you can try and find a copy of the book at WMI or your local library.

The Merck Manual

The National Academies Press
The National Academies Press (NAP) was created by the National Academy of Sciences to publish the reports of the National Academy of Sciences, National Academy of Engineering, Institute of Medicine, and National Research Council, all operating under a charter granted by the Congress of the United States. The NAP publishes more than 200 books a year on a wide range of topics in science, engineering, and medicine, providing authoritative information on important matters in science and health policy. The institutions served by the NAP are unique in their ability to attract leading experts in many fields to join panels and committees charged with providing policy advice on some of the nation’s most pressing scientific, technical, and health-related issues. [They] offer more than 4,000 titles in PDF format. All of these PDFs can be downloaded for free by the chapter or the entire book*. [Their] frequently asked questions guide answers questions about accessing [their] digital content.

National Center for Biotechnology Information Bookshelf
Bookshelf provides free access to books and documents in life science and healthcare.

Orthopedic Physical Assessment 5th Edition by David D. McGee

Open Library
Open Library is a catalog of books. Features include:

OpenStax College Textbooks
Provides free, open-source, peer-reviewed, high quality college level textbooks in Physics, Sociology, Biology, Anatomy/Physiology, Statistics, Pre-calculus, Economics, Chemistry, U.S. History and Psychology. This site is a project of Rice University.