zyBooks was founded in in 2012 by Smita Bakshi, a former UC Davis Electrical Computer Engineering professor, and Frank Vahid, a Computer Science and Engineering professor at the University of California, Riverside. Its mission is to help college STEM (Science, Technology, Engineering, and Math) students graduate. zyBooks web-based STEM material focuses mainly on computer science and engineering. Students learn by doing using materials with minimal text, question sets, animations, interactive tools, and embedded homework. zyBooks are collaboratively authored by talented teams of professors, content developers and software engineers. Academic contributors include Roman Lysecky (University of Arizona), Sandy Irani (UC Irvine), and Andre Knoesen and Raj Amirtharajah (UC Davis). Since its founding zyBooks, adoption has grown to more than 300 universities across the U.S. with more than 80,000 students having taken college courses using zyBooks instead of traditional college textbooks. There are currently 16 zyBooks spanning a range of computer science, math and engineering courses, and the company is aggressively expanding the library to provide comprehensive coverage across the STEM curriculum.