Some publishers require a U.S. shipping address - even when renting or buying access to an ebook or online tool.
Books for PHYS, CHEM, some MATH, and the PADR course materials are available through Cengage Unlimited, which is a subscription service that allows you to pay one price for access to all Cengage books for 4, 12, or 24 months depending on need (the longer the access, the cheaper the per semester cost). If you are in more than one class that uses a Cengage Unlimited book, it is likely cheaper to buy access to Unlimited than to buy each book individually. Be sure to buy the homework package if required and make sure your subscription will not expire before the end of the semester. You can buy your subscription and get instant access through Cengage, Amazon, or the TTU Bookstore website.
Many textbooks are available to buy through the TTU Bookstore online.
Allow about 5 business days to receive your code via email.
You may borrow some textbooks from the library for temporary use on campus (up to 2 hours at a time, free of charge) as a temporary solution to accessing your required text. If this option is available for your textbook, the related information is provided the course tabs on the left.