Direct answer: Before buying a textbook new at the campus bookstore, check your library's course reserves, then compare prices across Chegg, ValoreBooks, AbeBooks, and Amazon rentals — the same ISBN often varies by more than 60% in price across these platforms.
Start with what's already free
Many college libraries keep required textbooks on short-term "course reserve," letting students read or photocopy assigned chapters at no cost. Some professors also post older editions or full PDFs legally through the course learning platform — always check before buying anything.
Rental marketplaces
Chegg, ValoreBooks, and Amazon's textbook rental program let you pay a fraction of the retail price for a semester-long rental, then return the physical book afterward. This works best for courses where you won't need the book again later.
Used marketplaces and older editions
AbeBooks and ThriftBooks often carry used copies at steep discounts, and a slightly older edition (when the professor allows it) can be dramatically cheaper since publishers frequently make only minor changes between editions.
Open educational resources
For general education and intro-level courses especially, free peer-reviewed open textbooks (through platforms like OpenStax) increasingly replace commercial textbooks entirely, at zero cost and with no rental return deadline.
Is it legal to use an older textbook edition?
Yes, though you should confirm with your professor that page numbers, problem sets, or chapter numbering still line up closely enough for the course.
Do rental textbooks let you highlight and write in them?
Light highlighting is usually fine; excessive writing or damage can trigger a fee, so check the rental terms first.
Are open educational resources as rigorous as paid textbooks?
Reputable OER platforms like OpenStax are peer-reviewed and widely adopted by accredited universities, so quality is generally comparable for undergraduate-level material.