This world has definitely gone mad. If a person that actually admitted of not even being able to help his son with math homework, is capable of writing a book, than I’ll say it once again: “This world has definitely gone mad!”
Another explanation to this insanity would be he actually hired someone to write the book and paid him some crazy number to keep quiet. Wouldn’t be surprised if on next Jay Leno show somebody jumps out of audience, in the middle of David’s book promotion, with his version of book. We’ve seen it happen.