Xodoku Bet You Never Knew That 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 provide fascinating facts from the archives of the world s history. 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 puzzles are high... more »ly addictive.« less