This is the official YouTube channel Pat McKeague, the owner of XYZ Textbooks and MathTV.com. XYZ Textbooks publishes college level mathematics textbooks. Our mission is to offer high quality educational materials, at reasonable prices, with students having a choice as to the format and price they prefer. Our print books are all under $100, and our eBooks are less than that. Every print book comes with access to all of our eBooks. MathTV.com has over 14,000 instructional videos to help students learn everything from basic math through calculus. Each problem is worked by multiple instructors.