After being traditionally published for many years, this formidable text by W. Keith Nicholson has been released as an open educational resource and part of Harris Learning Solutions with Open Texts! Supporting todayÕs students and instructors requires much more than a textbook, which is why Dr. Nicholson opted to work with Harris Learning Solutions. Overall, the aim of the text is to achieve a balance among computational skills, theory, and applications of linear algebra. It is a relatively advanced introduction to the ideas and techniques of linear algebra targeted for science and engineering students who need to understand not only how to use these methods but also gain insight into why they work.