Entelek Problem-Solving With The Computer, Edwin R. Sage, 1969, Paperback

Ivan Moscovich's Super-Games Paperback Mind Games 1984 Problem Solving Puzzles

Signs and Wonders Paperback Maria B. Woodworth-Etter

Set of 2: Problem Solving with Polyhedra Dice & Pack of Polyhedra Dice

Data Abstraction & Problem Solving with C++ Walls and Mirrors 6th Ed. Textbook

Teaching Creative Thinking And Problem Solving - John F. Feldhusen (PB, 1984)

Ripe: A Novel - Paperback By Etter, Sarah Rose - GOOD

Dogs Misbehaving: Solving Problem Behaviour with Bach Flower and Other Remedies