50 Logic Puzzles: Full of Fun Logic Grid Puzzles!: Volume 2 (Brain Teaser Puzzle Books)

50 Logic Puzzles: Full of Fun Logic Grid Puzzles! (Brain Teaser Puzzle Books)

Puzzle Baron's Logic Puzzles: Hours of Brain-Challenging Fun!

50 More Logic Puzzles: Full of Fun Logic Grid Puzzles! (Brain Teaser Puzzle Books)