Hello @Krista Crandall,
Yes, when you register for a CDA course, you will receive a textbook in the mail. However, if you haven't yet received your book, please reach out to our Customer Support team and they will be able to ship another one to you! In the meantime, you should be able to continue working in your modules even if you don't have your book.
Let me know if I can assist you with anything else!
Best,
Rachel