books by subject
Geometry

Euclid's Elements

The Fabulous Fibonacci Numbers

Dr. Math Presents More Geometry: Learning Geometry is Easy! Just Ask Dr. Math

2D Shapes

Lie Algebras

Fractals for the Classroom: Part Two: Complex Systems and Mandelbrot Set

Fractal Creations

Fractals for the Classroom: Strategic Activities Volume Two

Edmund Husserl's "Origin of Geometry": An Introduction

Mathematics for Physicists: Introductory Concepts and Methods

Modern Differential Geometry For Physicists (2nd Edition)

Crop Circles: The Hidden Form

Handbook of Trust Research

Geometry For Dummies

Geometry Civilized

Vectors in Two or Three Dimensions

Comprehensive Introduction to Differential Geometry

Foundations of Linking Theory

Automorphisms of Surfaces after Nielsen and Thurston

Low Dimensional Topology

Applicable Differential Geometry

The Symbolic Language of Geometrical Figures

Low-dimensional Topology and Kleinian Groups

Schaum's Outline of Geometry: 665 Solved Problems + 25 Videos

Pythagoras and his Theorem

Calculus with Analytic Geometry

The Knot Book

Fibre Bundles

A Primer for Mathematics Competitions
