Mathematics and Plausible Reasoning, Volume 1: Induction and Analogy in Mathematics

Foundations and Fundamental Concepts of Mathematics

Modern Nonlinear Equations

Challenging Problems in Geometry

The Stanford Mathematics Problem Book: With Hints and Solutions

Geometry, Its Elements and Structure: Second Edition, Edition 2

The Mathematical Experience, Study Edition

Problems and Theorems in Analysis II: Theory of Functions. Zeros. Polynomials. Determinants. Number Theory. Geometry

A Beginner's Guide to Mathematical Logic

Problems and Theorems in Analysis I: Series. Integral Calculus. Theory of Functions

Measurement

Beautiful Geometry

Fundamental Concepts of Geometry

Fast Math: Learn the Secrets of Mental Math: By Using Vedic Math and Other Math Tricks to Perform Mental Calculations from Multiplication to Percentages without Calculators

Mathematics for the Physical Sciences

Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies (Academic Edition)

536 Puzzles and Curious Problems

A Transition to Advanced Mathematics: A Survey Course