1.
Pentomino Puzzles: 365 Teasers to Keep Your Brain in Shape
by Harshbarger, Eric
ISBN: 9781402766992
List Price: $14.95
3.
United States of Puzzles : Word Games, Brainteasers, Trivia, and More!
by Harshbarger, Eric
ISBN: 9781454949633
List Price: $12.99
6.
United States of Puzzles : Word Games, Brainteasers, Trivia, and More!
by Harshbarger, Eric
ISBN: 9781454933373
List Price: $9.95