Physicist Victor Stenger says "The Grand Design", written by Stephen Hawking and Leonard Mlodinow, deserves its position on the bestseller list but should have been called, "The Grand Accident". "Some reviewers have criticized The Grand Design for basing its case on the highly speculative M-theory. Actually, even without M-theory the alternate histories of Feynman together with cosmological models...are sufficient to provide a purely natural, non-causal explanation for the existence of our universe and our place in it. M-theory or no M-theory, the pieces of our universe fell into the places where they are, not because of a guiding hand and a grand design, but through mere accident."