Free Precalculus Textbook

Textbooks can be expensive. Fortunately, some professors are looking out for students’ financial interests and have developed free and open textbooks. A collection of some of the current available books can be found at Stitz Zeager Open Source Mathematics.

Professor’s Stitz and Zeager offer a precalculus book released in July of 2013 that can be obtained in a pdf format. Here is a preview of the first two chapters: