This book was pretty useless if you want to learn anything about Thomas Edison actually inventing. This book is more about what caused him to first be able to work a telegraph that led to all his other inventions. The feature about this book that I found to be useful was a timeline of major events and inventions in the back of the book. While it was interesting to learn what started Edison on the telegraph, this book really doesn’t teach anything about Edison’s actual inventions, which is why I ranked it 2 out of 5. ( )