This book is OK overall. However, the photo on page 10 that is claimed to show Albert Einstein and Tesla with a group of scientists does not. The man the author claims is Tesla is not. The face is obviously not Tesla! Tesla was six feet two inches tall. Einstein was five feet eight inches tall. The two men in this photograph are the same height. Tesla was six inches taller than Einstein and would have towered over him and most of the scientists in this photograph. It's a glaring error on the first page of chapter one!