‘Not only does this book help students learn how to prove results, it highlights why we care so much. It starts in the introduction with some simple conjectures and gathering data, quickly disproving the first but amassing support for the second. Will that pattern persist? How can these observations lead us to a proof? The book is engagingly written, and covers – in clear and great detail – many proof techniques. There is a wealth of good exercises at various levels. I’ve taught problem solving before (at The Ohio State University and Williams College), and this book has been a great addition to the resources I recommend to my students.’ Steven J. Miller, Williams College, Massachusetts

‘This book is my go-to resource for students struggling with how to write mathematical proofs. Beyond its plentiful examples, Velleman clearly lays out the techniques and principles so often glossed over in other texts.’ Rafael Frongillo, University of Colorado, Boulder