This is a free textbook. It represents hundreds of hours of scholarship, writing, and editing work. It is licensed under a CC BY 3.0 (Attribution) license. This means that you are generally free to share and adapt the contents of this book as long as you provide proper attribution.

Some embedded content in this book (such as YouTube videos) may not be licensed in the same way as the book generally. Before using embedded media content in your own project, please check the license on the specific resource.

Since this book contains a collection of resources, not all are licensed in the same way. Please refer to available licensing information on individual chapters if provided, because licensing on individual book elements (e.g., chapters, videos) overrides the boilerplate license for the book.