Nothing's better than a mystery to unlock a child's abilities in logic and deduction, and to strengthen reading skills - and it's elementary that stories based on literature's greatest detective will be most satisfying. The numbers prove it: Tom Bullimore's "Sherlock Holmes' Puzzles of Deduction" has sold 95,000 copies. This entertaining collection should enjoy the same success. Each puzzler is very brief, but it takes some brainwork to come up with the answers.