This book contains two new brain games "AlphaDoku" and "MultiSumDoku" created by the author of this book in 2015. This book is designed in a way to let you enjoy playing the games, and at the same time you are able to calculate your IQ score, and your brain's performance which is not the case of any other book in the same category. Moreover, this book helps you to improve your analytical reasoning, logical reasoning, critical thinking, intelligence, attention, processing speed, memory, problem-solving, brain's performance, dexterity, Decision-making, concentration, mental calculation, reflection, logical skills, flexibility, etc. This book contains 10 levels for AlphaDoku and 13 levels for MultiSumDoku from extremely easy to the hardest level, and each level contains 20 puzzles, in total it contains 460 puzzles. Solutions are shown at the end of each level.This book is highly recommended for people who love brain games, and who want to develop and improve their brains' performance.