Designed for the person who needs to learn precalculus as a prerequisite for calculus or a refresher course before moving on, the book covers all of the precalculus concepts such as functions and graphs, trigonometry, analytic geometry, systems of inequalities, matrices, sequences, series, probability, and more. It is available in digital editions that are completely hyperlinked and interactive with self correcting exercises integrated throughout the text. Each title in the series will include basic concepts in easy to read format, designed for those who are uncomfortable with mathematics. It will also include numerous step by step examples and practice exercises that help the reader to understand the topics in a "self-study" format.