Written by a world expert on the subject, Origametry is the first complete reference on the mathematics of origami. It is an essential reference for researchers of origami mathematics and applications in physics, engineering, and design. Educators, students, and enthusiasts will also enjoy this fascinating account of the mathematics of folding.

While piloting his spaceship through the skies, Captain Invincible encounters three-dimensional shapes, including cubes, cylinders, and pyramids.

Learn to recognize and spell basic shapes, each one illustrated with a sliding foil shape that moves.

Three mice make a variety of things out of different shapes as they hide from a scary cat.

No matter how hard she tries, Triangle doesn't roll like the circles, or stack like the squares. She sets off to find friends that look exactly like her. But when she finds other triangles, playtime isn't as fun. She misses shapes that roll and stack; she misses being different. So she starts a new quest.

In MAT MAN SHAPES (hardcover), The popular Mat Man™ character comes to life in an imaginative tale that takes children to a world of shapes and rhymes. A friendly hero opens students' minds to shapes, rhyming verse, imagination, exploration, and community in the first book of the Mat Man™ reading series.