This book started out OK but it quickly got excessively repetitive to me. I couldn't help but wonder if Diamond was just trying to figure out how many ways he could say the same thing. I mean, sheesh, you've already told us once do we really need to hear it again? The book could have been shortened to about 1/3 of it's length if you retracted the redundancy. Each section left me with a feeling of deja vu.