Book excerpt: Stand out from the pack--don't think conventionally, think laterally! And, you can start developing well-honed mental skills with more than 80 braintwisting puzzles that test your creativity and smarts. At first it might not seem as if there's enough information to solve them, but if you just persist, you'll come up with the logical answers. Some of the conundrums come from real life: try to figure out how the Greek playwright Aeschylus could have been killed by a tortoise or how the truth about Mary Queen of Scots' baldness was finally revealed. Or, give this a shot: A runner was awarded a prize for winning a marathon. But, the judges disqualified him when they saw a picture of his wristwatch. Why? Happy puzzling! Answer: A picture of the runner early in the race showed him wearing his watch on his right wrist. When he crossed the finishing line it was on his left wrist. The judges investigated and found that one man had run the first half and his identical twin brother ran the second half of the race.