That's a savings of $6. Buy Now at Amazon
Shop nearly 500 books. We've pictured the best-selling The Summer I Turned Pretty by Jenny Han ($3 off). Opt for store pickup to avoid the $6 shipping fee, or get free shipping over $40. Shop Now at Barnes & Noble
For National Comic Book Day, take a chance on a classic with an interactive twist. Starting at $1, pay what you like for the various components of a Transformers role-playing game. Save on up to 15 items (some of which are physical; shipping may vary by location). Buy Now at Humble Bundle
Over 400 titles are eligible for this sale. Pictured is Taste of Home Copycat Restaurant Favorites Hardcover Book for $10. Shop Now at Barnes & Noble
Save up to 80% off a selection of textbooks in various conditions. You can also save on companion pieces like CliffNotes books. Shipping adds $3.99 but pickup is also available. Shop Now at Half Price Books
Save big on trading cards for sports, Pokemon, Yu-Gi-Oh, Magic: The Gathering, and more at StockX. This offer is ongoing. Buy Now at StockX
Get up to $100 off retail prices on collectibles at StockX. You will find deals on LEGO, Fuko, comics, art prints, action figures, and much more. Shop Now at StockX
In celebration of Star Trek Day, save $30 on this companion to the original, animated, and new generation series. Buy Now at Amazon
Each month, Prime members can avail of one free Kindle eBook from a selection, plus a bonus short read for $1.99 each. Shop Now at Amazon
Much-beloved former editor of these very halls Molly Harris, along with illustrator Alison Hawkins, brings you a hardworking little sponge's story of self-care and friendship. It's $4 off right now, but never mind that: it's Molly! SUPPORT HER. Buy Now at Amazon
Shop dozens of titles, including the pictured The Barefoot Contessa Cookbook for $18.39 ($17 off). Shop Now at Target
Get this daily deal for half what you'd pay at Barnes & Noble. Buy Now at Amazon
For National Book Lovers Day, get these leatherette-bound classics for $26 less than you'd pay elsewhere. Buy Now at Amazon
If you sign up to a 30-day free trial, you can choose one book from their full library and another two from their VIP section. After the trial ends, it costs $15/mo. (which includes an audiobook and VP book each month). Shop Now at Audiobooks.com
Shop up to 50% off collectibles at StockX. Start a new collection or find missing pieces to your collections. Shop Now at StockX
Add a second to your cart to see the price fall automatically. There are 16 on offer, most of which are already discounted. Shop Now at Target
Save on over 400 books. We've pictured the Silent Patient by Alex Michaelides for $11 ($7 off). Shipping adds $5.99, or is free for orders over $35. In-store pickup may also be available. Shop Now at Target
That's $8 less than you'd pay for the audiobook at Barnes & Noble. (Plus, the Kindle edition is also discounted to $1.99 right now.) Buy Now at Amazon
This National Book Lovers Day, get your first month of ComiXology Unlimited for free — you'll get access to over 45,000 titles from Marvel, DC, Dark Horse, Image, and more, including Civil War, Attack on Titan, Invincible, and The Boys. You'll also get members-only discounts and ComiXology Originals. The plan auto-renews at $5.99 per month, so cancel before the trial expires to avoid paying. Shop Now at Amazon
Save on mysterious titles like "The Book Of Bizarre Truths", "The Book Of Unusual Knowledge", "The Book Of Incredible Information", and more. Shop Now at Amazon