Pre-Calculus

Calculus Made Easy

Solid Geometry with Problems and Applications (Revised edition) 

The Foundations of Geometry

An Introduction to Mathematics 

A Treatise on Probability 

Plane Geometry 

The Theory of Numbers 

Elementary Illustrations of the Differential and Integral Calculus 

Geometry Illuminated: An Illustrated Introduction to Euclidean and Hyperbolic Plane Geometry

Calculus Practice Problems for Dummies

6th Grade Math Textbook, Fundamentals 

100 Math Brainteasers. Arithmetic, Algebra, and Geometry Brain Teasers, Puzzles, Games, and Problems...

Math tricks, Brain twisters and Puzzles

The Everything Kids - Math Puzzles Book 

Skill Sharpeners Math, Grade 1

Skill Sharpeners - Reading - Grade K 

The Algebra Teacher's Activity-a-Day, Grades 6-12: Over 180 Quick Challenges for Developing Math and Problem Solving Skills