Since our founding, volunteers have written about 55,516 modules in a multitude of textbooks.
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Some Featured Books
Cognitive Psychology is a psychological science which is interested in various mind and brain related subfields such as cognition, the mental processes that underlie behavior, reasoning and decision making.
Human Physiology explains, system by system, the workings of your body. It is intended as an understandable undergraduate-level guide to how the body systems function at a cellular level and how they work together to maintain a favorable environment for your cells. You and your class are invited to use and improve this book!
Control Systems is an inter-disciplinary engineering text that analyzes the effects and interactions of mathematical systems. This book is for third and fourth year undergraduates in an engineering program.
Special Relativity is an introductory text for physics undergraduates and advanced high school students. It is also approachable by the educated layman. It is carefully designed to tackle the physics of simultaneity.