Greg Tang
Math Fables: Lessons That Count
Math Appeal: Mind-Stretching Math Riddles
Math Fables: Lessons That Count
Math-terpieces: The Art of Problem-Solving
Math Fables Too: Making Science Count
Math Potatoes: Mind-stretching Brain Food
Math For All Seasons: Mind-Stretching Math Riddles (Scholastic Bookshelf)
Math Fables: Lessons That Count