Brain Fitness Boot Camp - Mental Assault Course by Tim Dedopulos
"Brain Fitness Boot Camp" is a fun and energetic range of puzzle books designed to wake up your brain and get it into peak condition. It's like having your own personal fitness instructor - without the shouting! "Demanding" puzzles are for solvers who relish a challenge. This book will test your observation, logic, lateral thinking and number skills. If you've already mastered the "Rookie" books, you'll be ready for this.