Hi there, @ShaeBennett ...
Unfortunately, I don't think many here in the Community will be able to help you directly with finding your eBook. I would recommend contracting your instructor directly in Canvas. One of the ways that you can do this in Canvas is by going to the "Help" menu on the far left-hand global navigation menu, and then you can choose "Ask Your Instructor a Question". This is also detailed in:
How do I get help with Canvas as a student?
Regarding e-mail... Canvas technically does not have e-mail. They do have a messaging system, however, via the Canvas Inbox (the "Inbox" icon on your left-hand global navigation menu). You can use the Canvas Inbox to send a message to your instructor(s) and classmate(s) who are enrolled in the same courses that you are enrolled in. However, you cannot use the Inbox to send messages to your friends and family...mainly because they are more likely not enrolled in the same courses. Also, your friends and family cannot send you e-mails that you would receive in your Canvas Inbox. The Inbox is really for course communication. However, you can set up your Notification settings (both at the course and the Canvas user account level) for how you want to be notified about messages you get via the Canvas Inbox.
Hopefully this helps to clarify things for you. Sing out if you have any other questions about this...thanks!