This book is packed with tons of high-yield concepts that will serve you well throughout your medical career. It started out as several hundred pages, and was revised over fifty times before finally producing the ultimate gunner review. It holds some of the most commonly missed concep... ts on the exams. It is meant to supplement the core review books by revealing those high yield concepts that could really push you to achieve your best possible score. What they don't tell you when you're preparing for the MCAT or for the USMLE STEP 1 is that these same concepts are repeated again and again... and again. From the MCAT all the way to the STEP 3 exam. The way the question is asked is more ambiguous as you move further along, but the concept hasn't changed.