Introduction to Algebraic Geometry

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

Calculus of Several Variables: Edition 3

An Introductory Course in Elementary Number Theory

Ramanujan's Lost Notebook: Part I, Part 1

Undergraduate Analysis: Edition 2

Notebooks of Srinivasa Ramanujan: Volume II, Volume 2

Challenges

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

Math Talks for Undergraduates

Complex Numbers from A to ... Z: Edition 2

A History of Pi

Differential Manifolds: Edition 2

Number Theory: Structures, Examples, and Problems