- Math for all seasons, by Greg Tang ; illustrated by Harry Briggs
- Math appeal, mind stretching math riddles, by Greg Tang ; illustrated by Harry Briggs
- A brief history of underpants /c, written by Christine Van Zandt ; illustrations by Harry Briggs
- Math potatoes, mind-stretching brain food, by Greg Tang ; illustrated by Harry Briggs
- The grapes of math, mind-stretching math riddles, by Greg Tang ; illustrated by Harry Briggs
- The best of times, math strategies that multiply, by Greg Tang ; illustrated by Harry Briggs