Cubeworld    by Hank Gross
Price: $9.99 USD. 20400 words. Published on February 8, 2010. .
An adventure in solid geometry wherein our spherical planet is reformed into a cube, engendering many odd effects -- rain falls at an angle, the oceans gravitate to the centers of the sides, and unexpected pyramidical forces send Cubeworld on a hairraising journey through the solar system. If you liked Flatland, you'll like Cubeworld.

Solving the Three Ancient Problems using the Graef Curves    by Edward V. Graef
Price: $4.99 USD. 5310 words. Published by Marsha Bauer on September 25, 2011. .
Three Ancient Problems (trisecting the angle, squaring the circle, duplicating the cube) have challenged mathematicians for 2000 years. It's impossible to solve them using compass and straightedge alone, so mathematicians were challenged to create a curve or curve family to solve all three. No one accomplished this feat--until Graef. His curves were verified/published in top math publications.

How to Solve a Rubix Cube    by Capee Slash
Price: Free! 1220 words. Published by James Pollard on December 20, 2011. .
This book was written by a teenager for teenagers or anybody clever enough to be able to follow instructions. It walks you through the steps you need to know about in order to be able to solve a rubix cube. There are other, more complex methods available but this one is the easiest for beginners. You might not get it straight away but if you persist, you will get it.