Combinatorics
Robin J. Wilson
Discrete Mathematics
Norman L. Biggs
The Sunday Times Teasers. Book 1
John Owen
Combinatorial Extremization: In Mathematical Olympiad And Competitions
Yuefeng Feng
Combinatorial Problems in Mathematical Competitions
Yao Zhang
A Walk Through Combinatorics
Miklós Bóna
Concise Computer Mathematics
Ovidiu Bagdasar
Discrete Mathematics: A Combinatorial Approach
Christos A. Athanasiadis
Graph and Network Theory
Michael A. Henning
A First Course in Enumerative Combinatorics
Carl Wagner
Random Numbers Unveiled
George Szpiro
More Monthly Problem Gems
Hongwei Chen
Graph Learning Techniques
Baoling Shan
Puzzle and Proof
Samuel Dittmer
Playing With Infinity
Hans Zantema
Graphs & Digraphs
Gary Chartrand
Lessons in Play
Michael H. Albert
Discrete Mathematics With Coding
Hugo D. Junghenn
Combinatorial Optimization Under Uncertainty
Ritu Arora
Combinatorial Optimization Under Uncertainty
Ritu Arora