Answer: No. We occasionally will have a copy of a required book in our eBook databases, but in general, plan on purchasing access to any required textbooks you don't already have access provided to in your course.
Answer: Here's a link to the CSU Global bookstore. It's fully online, there isn't a physical bookstore location.
Answer: No. You can buy your textbook from wherever you would like. But, if you're ordering a physical copy of the textbook plan ahead and make sure you have book by the time your course starts. The class will not wait to start until you have your book.