A History of Abstract Algebra: From Algebraic Equations to Modern Algebra (Springer Undergraduate Mathematics Series)

Nicomachus' Introduction to Arithmetic (Texts of the Quadrivium)

Pythagoras: His Life and Teachings

Number Theory in the Spirit of Ramanujan

Discrete Mathematics: Elementary and Beyond (Undergraduate Texts in Mathematics)

Mathematical Olympiad Challenges

Elementary Number Theory

Number: The Language of Science

Applied Proof Theory: Proof Interpretations and their Use in Mathematics (Springer Monographs in Mathematics)

Complex Abelian Varieties