Tanglers: Cooperative Problem-Solving Puzzles, Paperback
Paul Fleisher
What's the Problem?: A Story Teaching Problem Solving, Paperback/Bryan Smith
Bryan Smith
The Back of the Napkin: Solving Problems and Selling Ideas with Pictures, Paperback
Dan Roam
The Back of the Napkin: Solving Problems and Selling Ideas with Pictures, Hardcover/Dan Roam
Hacking Mathematics: 10 Problems That Need Solving, Paperback
Denis Sheeran
The 3rd Alternative: Solving Life's Most Difficult Problems, Paperback
Stephen R. Covey