9 books • 3 series
Judgement Day (Thinking about Thinking, #1)
How to Advise The President (Thinking about Thinking, #2)
The No Recipe Cookbook
Sam the Problem Solver (Sam's World, #1)
How to Invent Almost Anything
Creative Problem-Solving
A Teacher's Guide to Managing Change (Professional skills for teachers)
Make it Count with Numberpower
Make it Count