This text is a core book or supplement for biology courses or math biology courses. It will also be used in advanced courses in ecology, cell biology, and physiology found in various biology departments. This inexpensive paperback exposes students to some of today's most exciting and progressive research topics. This diverse compilation of case studies illustrates the unifying role of applied mathematics throughout the biological sciences. Written by leaders in the field, the cases demonstrate how successful modelers have used mathematics to answer real biological questions and takes students step-by-step through the entire analytical process - question, model formulation, analysis, results, testing, and interpretation.