Classavo course books are built to be online interactive experiences and do not come in PDF format. The features that make your interactive experience so special, like 3D models, interactive code editors and responsive assignments, are only accessible online by you and your students. These interactive course books are optimized to be a cost-effective and engaging alternative to printed books that are both expensive and ineffective due to a lack of immersion. Our interactive experiences have been designed to be engaging to students and the best way to interact with the book is online at classavo.com! However, students are able to print copies of the interactive course if they so choose.