The Magic of Mathematics
Discovering the Spell of Mathematics »

Puzzles from Penrose the Mathematical Cat
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Math Stuff
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Math for Kids & Other People Too!
& Other People Too! »

Math-A-Day
A Book of Days for Your Mathmematical Year »

The Further Adventures Of Penrose
An illustrated tale about the adventures of a mathematical cat; introducing the concept of pi, symmetry, and multiplication through a series of puzzles, game... »

The Music of Reason
Experience The Beauty Of Mathematics Through Quotations »

The Adventures of Penrose the Mathematical Cat
The Mathematical Cat »

Mathematical Scandals
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Fractals, Googols, and Other Mathematical Tales
The Book »