This book will work with any device (including ipad/iphone/PC) with the Kindle reader. 1. Open-ended question format that forces the student to think. 2. The book contains 100 questions. 3. Great study tool for USMLE Step 1 and Step 2 4. Designed for students to finish reading the weekend before their exam. 5. Download free sample and try for free. 8. Affordable price and free future updates by re-downloading subsequent versions.