"The Brain That Changes Itself" is a book by Norman Doidge that explores the concept of neuroplasticity, which is the brain's ability to reorganize itself by forming new neural connections throughout life. This groundbreaking idea challenges the traditional belief that the brain is fixed after a certain age and highlights how experiences, learning, and even injuries can reshape brain function. The book presents various case studies demonstrating how individuals have successfully retrained their brains to overcome challenges such as stroke, learning disabilities, and chronic pain. Through these stories, Doidge illustrates the potential for recovery and growth, emphasizing that the brain is capable of change at any stage of life.