Point-Set Topology
Rafael López
Fundamentals of Real and Complex Analysis
Asuman Güven Aksoy
Manifolds, Vector Fields, and Differential Forms
Gal Gross & Eckhard Meinrenken
Squigonometry: The Study of Imperfect Circles
Robert D. Poodiack & William E. Wood
Essential Ordinary Differential Equations
Robert Magnus
Calculus off the Beaten Path
Ignacio Zalduendo
An Invitation to Representation Theory
R. Michael Howe
Metric Spaces
Robert Magnus
An Introduction to Infinite Products
Charles H. C. Little, Kee L. Teo & Bruce van Brunt
Quadratic Number Fields
Franz Lemmermeyer