Eugene Braunwald & Anthony S. Fauci 
Harrison’s Manual of Medicine: 16th Edition [PDF ebook] 

The authority of Harrison’s at the point of care! Covering the full scope of internal medicine, the new edition of this "mini-textbook" is thoroughly revised to reflect new content areas and quicker retrieval of clinical information. The manual continues to focus on diagnosis and therapy with an emphasis on patient care. Features a new section on Care of the Hospitalized Patient, with a new chapter on Procedures in Internal Medicine as well as a section on patient admittance orders.