Preschool Math Workbook: Number Tracing, Addition and Subtraction math workbook for toddlers ages 2-4 and pre k

Are Numbers Real?: The Uncanny Relationship of Mathematics and the Physical World

Number Theory (Dover Books on Mathematics)

PHILOMATH: The Geometric Unification of Science & Art Through Number

The Transcendental Tangle: Untying the Enigmatic Knots of the Infinite: A Playful Exploration and Guide to the Enigmatic World of Transcendental Numbers ... Unraveling the Secrets of the Numberverse)

Proofs from THE BOOK

Euclid's Elements

The Math Book (DK Big Ideas)

A Mathematician's Apology

Euclid's Elements Book One with Questions for Discussion