Combinatorics and Counting: 100+ Exercises with Detailed Solutions | From Permutations to Complex Problems

A Path to Combinatorics for Undergraduates: Counting Strategies

Counting and Configurations: Problems in Combinatorics, Arithmetic, and Geometry

Counting: The Art of Enumerative Combinatorics (Undergraduate Texts in Mathematics)

Notes on Counting: An Introduction to Enumerative Combinatorics: 26 (Australian Mathematical Society Lecture Series, Series Number 26)