Xodoku Amazing Sports Facts Author:Pat Battaglia, Ross Helfer All puzzles in the Xodoku series are more that just challenging and fun to solve. The puzzles in this book reveal little-known but fascinating feats and facts in the history of sports. No special skill is required for solving, so the puzzles can be enjoyed by people of all ages and educational backgrounds. However, be careful - the puzzle... more »s are highly addictive.« less