Problem Solving and Comprehension, 6th Edition
Arthur Whimbey & Jack Lochhead
Lawrence Erlbaum Associates, Publishers (C)1999
ISBN 0-8058-3274-2
Puzzle-Based Learning: an introduction to critical thinking, mathematics, and problem solving
Zbigniew Michalewicz and Matthew Michalewicz
Hybrid Publishers (C)2008
ISBN 978-1-876462-63-5
How to Think Like a Mathematician
Kevin Houston
Cambridge University Press (C)2009
ISBN 978-0-521-71978-0