Rent textbooks. If you rent from the Chico State Wildcat Store you can still highlight and take notes; if you decide to keep it at the end of the semester you can pay the difference then.
Purchase an e-book or looseleaf version of your book (if available).
Actively shop textbook markets before classes begin. Chico State Wildcat Store has a price-match guarantee.
If you purchased a new or used version, you can often sell back your textbooks at the end if the semester. The combination can sometimes be cheaper than renting.
Check the library. There may be a copy of your book(s) listed on course reserve or to be checked out from the regular collection.
Encourage your instructor to consider OER options as alternatives.
Share with a classmate. Develop an agreed upon schedule to share each week.
Trade books that you no longer need for ones you do.