Perfect Book for Puzzlers. This is a Number Puzzle Book which has 200 Domino Puzzles to start tuning your brain power. The puzzles are in large print with 2 puzzles per page. Each puzzle has a solution, but is available towards End of the Book. Train Your Brain on the go or when you got a few mins with these moderately easy puzzles. Book is in Perfect size (8.5x11) with just 150+ pages to keep it handy all the time. Grab the book right now & have fun.