James Bergin 
Medicine Recall [PDF ebook] 

Written primarily for third- and fourth-year medical students in clerkships, Medicine Recall, Fourth Edition covers the core specialty areas within internal medicine: cardiology, pulmonology, nephrology, gastroenterology, hematology, oncology, infectious disease, endocrinology, allergy and immunology, rheumatology, neurology, and dermatology. The book is written in the rapid-fire Recall Series question-and-answer format, with the question on the left side of the page and the answer on the right. Mnemonics are interspersed throughout. Each chapter is written by faculty, students, and fellows and emphasizes diagnosis and treatment.