This resource is in use at Portland State University. It can be freely accessed, shared, downloaded, and modified under similar licensing. It is available in a variety of file types at the link below this paragraph. Additionally, it is available in the Open Textbook Library, where it has also undergone peer review. Click here to read those reviews.
Exploring Open by Kathy Essmiller is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.