Entropy and Diversity: The Axiomatic Approach
Tom Leinster
Proof and the Art of Mathematics: Examples and Extensions
Joel David Hamkins
Everything You Always Wanted To Know About Mathematics
Brendan W. Sullivan
Introduction to Algorithms, Third Edition
Thomas H. Cormen & Charles E. Leiserson & Ronald L. Rivest & Clifford Stein
Combinatorial Optimization: Theory and Algorithms
Bernhard Korte & Jens Vygen
Algorithms and Combinatorics (1)
Algorithms and Combinatorics (2)