If you’ve had the misfortune of buying your textbooks as an undergraduate, you know that they can quickly rack up your debt. Some textbooks cost more than a calculator, or even comparative to a class, depending on where you attend school.

And as a graduate student, you normally have to purchase your books no matter what—but today’s students do have more choices than they’ve had in the past. If college students were told in the sixties that they’d be able to set up a queue of textbooks to rent on the computer—and have those textbooks shipped to them at home for a low monthly fee, which includes the price of shipping—they probably would have been either pretty excited or pretty confused. Either way, it’s definitely a potential perk of living in the technological age, especially if you’ve got some pricey books to buy.

Bookswim.com is one place where books can be rented—or even eventually purchased—cheaply. It actually works via the site Chegg.com. According to the site, students can save up to 65 to 85% by renting through their own system. The database is very easy to search by the use of title or ISBN. Multiple ISBNs can also be used in searches. And for environmental enthusiasts, there’s an additional green perk—for every book rented, sold, or bought at the site, a tree will be planted.

Another site that claims you can save up to 75% on is BookRenter.com. They, too, have free return shipping, as well as five rental periods to use that allow students to rent during most college semesters—and to return books as soon as they’re finished using them. All orders have next day or two-day shipping available, and all editions are U.S. only.

According to CampusBookRentals.com, you can save up to 85% with their services. Another site with free shipping, they emphasize that it’s okay to highlight or write in their books. You can reserve a book with your mobile phone, and start the program with a 30-day worry free guarantee. If a student chooses to drop a class or no longer needs the book, they have 30 days to return it by in which they will receive a full refund. Money spent on this site also helps provide laptops, sports equipment, and school supplies for needy kids. Around since 2007, CampusBookRentals also has monthly scholarship giveaways, shirts, book giveaways and other “perks” described on their website just for members.