'This book is written in an engaging, conversational style, and this reviewer found it enjoyable to read through (besides learning a few new things). Along the way, there are a few surprises, like the 'world's fastest proof by induction' and a magic trick. As a resource for teaching, and a handy basic reference, it will be a great addition to the library of anyone who uses combinatorial identities in their work.' Society for Industrial and Applied Mathematics Review
Award-winning math professors Arthur Benjamin and Jennifer Quinn demonstrate that many number patterns can be understood by simple counting arguments. Numerous hints and references are given for all exercises and the extensive appendix of identities will be a valuable resource. Ideal for readers from high school students to professional mathematicians.