・ Just one question a day to sharpen your brain! Doctors' Drill: Designed by a neurosurgeon based on medical evidence x1 ・ Just one question a day to sharpen your brain! Doctors' Drill 2: Designed by a neurosurgeon based on medical evidence x1 Total: 2 books ● No writing as they were copied. ● Cover has some creasing and wrinkles. ● Please understand that these are used books that have been handled by someone else. ● Will be shipped using recycled materials from home. Thank you for your understanding. [Product Details] This book is "Doctors' Drill," created by a practicing neurosurgeon. Brain function, or brainpower, can be divided into five abilities. Each brain ability is deeply connected to different parts of the brain. Understanding this deeply and stimulating the brain intensively is essential for improving brainpower. By solving one question a day from this drill, your brain's activation switch will naturally turn on, and your brainpower will dramatically improve. This book provides such "brain activation switches" for each of the five brain abilities. All the questions are fun to solve, and there are plenty of features to keep you engaged, such as time measurements. Start the Doctors' Drill today and experience the feeling of your brain becoming sharper and sharper. Perfect as a gift for parents and grandparents! Ascom, One question a day, Doctors' Drill, Bestseller, Memory improvement, Concentration improvement, Designed by a doctor, Neurosurgeon, Hisashi Ishikawa, Medical evidence, Cognitive function improvement for middle-aged and elderly, Memory improvement for children, Set, Bundle