October 6th and 7th are Prime Big Deal Days on Amazon, and there are a ton of books — including ebooks and print books — on sale today. Here are some of the most exciting deals happening now, ranging from 40-66% off.

While these are deals for Amazon Prime members, most of these books are on sale for non-members, too: it just might be the difference between 60% off versus 50% off. Many of these deals are limited, so grab them before they’re gone!

Don’t forget to check out our Daily Deals page for the best ebook deals of the day.

The Best Prime Big Deal Days Sales on Books

$9.99

The Secret History by Donna TarttGet This Deal

$6.25

The Deal by Elle KennedyGet This Deal

$39.99

The Lord of the Rings Illustrated by J. R. R. TolkienGet This Deal

$37.50

Sailor Moon Manga Box Set Vol. 1-6 by Naoko TakeuchiGet This Deal

$7.50

Pachinko by Min Jin LeeGet This Deal

$7.99

The Night Circus by Erin MorgensternGet This Deal

$17.25

House of Leaves by Mark Z. DanielewskiGet This Deal

$12.25

The Haunting of Hill House (Penguin Horror) by Shirley JacksonGet This Deal

$8.99

On Earth We’re Briefly Gorgeous by Ocean VuongGet This Deal

$9.50

Babel by R. F. KuangGet This Deal

$11.75

The Parable of the Sower by Octavia E. ButlerGet This Deal

$13.75

One Day, Everyone Will Have Always Been Against This by Omar El AkkadGet This Deal