Bard offers an introduction to Sage, an open-source and free mathematical software system available online. The text is appropriate for higher level undergraduate students in mathematics, finance, physics, or similar fields. The material is divided into six chapters, each showing a different use for Sage. The first chapter serves as an introduction to Sage, discussing its many uses. Chapter titles include "Advanced Plotting Techniques," "Fun Projects Using Sage," and "Programming in Sage and Python." There are several appendices including advice for when frustration hits, and a list of common Sage commands. Annotation ©2015 Ringgold, Inc., Portland, OR (protoview.com)