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Journey to the Edge of Reason

Journey to the Edge of Reason

Journey to the Edge of Reason

$30.00

Quubi

$16.00

99 Variations on a Proof

99 Variations on a Proof

99 Variations on a Proof

$20.95

IQ Digits

$16.50

Karmagami

$10.00

Shashibo - Undersea

Shashibo - Undersea

Shashibo - Undersea

$24.00

I Spy 123: Totally Crazy Numbers!

I Spy 123: Totally Crazy Numbers!

I Spy 123: Totally Crazy Numbers!

$14.95

Kaleidograph Color Crystal Design

Crystalline geometry in brilliant color.

Kaleidograph Color Crystal Design

$13.00

$Math on Trial$

How numbers get used and abused in the courtroom

$29.99

Second Kind of Impossible, The (Fiction)

The Extraordinary Quest for a New Form of Matter

Second Kind of Impossible, The (Fiction)

$27.00

Hanayama Infinity Puzzle | Level 6

Hanayama Infinity Puzzle | Level 6

$16.00

Q-bitz

$38.00