Encyclopedia of Distances: Edition 2

A Beginner's Guide to Constructing the Universe: The Mathematical Archetypes of Nature, Art, and Science

Figurate Numbers

Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks

Dictionary of Distances

Concepts of Modern Mathematics

Algebra II For Dummies: Edition 2

Generalizations Of Finite Metrics And Cuts

Algebra I For Dummies: Edition 2

Matrices And Linear Algebra

The Joy Of X: A Guided Tour of Math, from One to Infinity

Mathematician's Delight

How Numbers Work: Discover the strange and beautiful world of mathematics

Short-Cut Math

An Introductory Course in Elementary Number Theory

Quicker Approach to Quantitative Aptitude: Personal Notes of Sizil Krishna

103 Trigonometry Problems: From the Training of the USA IMO Team

The Trachtenberg Speed System of Basic Mathematics