First Aid for the USMLE Step 2- CS clinical skills fifth edition student-to-student guide, by Tao Le, Vikas Bhushan, Mae, Sheikh Ali, Kachiu Lee.
This book contains 44 full practice cases that stimulate the real exam including Pediatric and telephone interviews as well as suggested closing statements for each case.  It also includes a revised and expanded set of many cases representing common complaints designed to help you rapidly develop a set of differential diagnoses. It contains updated content based on feedback from recent us and international test-takers.