Doug Ensley is a full professor at Shippenshburg University with a Ph.D. from Carnegie Mellon.  He is an active participant in national and regional committees determining the future of the discrete math curriculum, and he regularly speaks at Joint Math and MathFest.

Winston Crawley is a full professor and chair of the math department at Shippensburg University.  He has a Ph.D. from University of Tennessee-Knoxville.  Crawley developed the undergraduate computer science curriculum at Shippensburg.

-Text is replete with “real world excursions” reinforcing the utility of discrete mathematics. 
-Online applications help improve students’ mathematical reasoning with intriguing, interactive flash-based applications which illustrate key mathematical concepts and help develop students’ ability to reason mathematically, solve problems and work with proofs.  Explore More Icons in the text direct the student to online activities at www.wiley.com/college/ensley.
- Every section contains a number of practice problems and at the conclusion of each chapter a section review outlines the major terms, concepts and skills covered in that chapter.
-Over 1,000 exercises ranging from routine reinforcement to conceptual challenges. 
-Appendices on basic matrix operations as well as an appendix explaining the basic rules and terminology for many of the games used for examples in the book. 
-Answers and hints are given in the back of the book and more detailed solutions to those exercises are found in a supplementary student solutions manual. 
 

"I like the book's approach to Discrete Math - consider it a set of puzzles we have to solve. This makes a supposedly "dry" subject quite interesting."

 -Saurabh Bagchi, Purdue University