The 20th edition of the world s #1 selling medical review book! Trust two decades of experience for the most effective USMLE Step 1 preparation possible 1100+ must-know facts and mnemonics organized by organ system and general principles Hundreds of high-yield clinical images you need to know before the exam including 24 pages of full-color photos Rapid review section for last minute cramming Ratings of 300+ top review products based on the authors annual survey of US medical students Updated test-taking advice from students who aced the 2009 exam Strategies that maximize your study time and deliver real results INSIDER ADVICE FOR STUDENTS FROM STUDENTS