In 1958, in a sweltering, converted torpedo factory in Alexandria, Virginia, historian Gerhard L. Weinberg was combing through massive stacks of documents that the U.S. had captured from Nazi Germany. In a faded green box, Weinberg came across an unknown prize, a secret book dictated by Adolf Hitler in 1928, the unpublished sequel to Mein Kampf. Mixed in with Hitler's racial hatred, the book contained shocking revelations of his master plan for continuous war. We follow the clues to its discovery and show the rigorous steps taken to authenticate the document - the book is considered legitimate. And we reveal the contents of the book.