Where to find free Kindle books
Amazon offers thousands of free books on Kindle every day, but they're scattered across different sections and change constantly. The fastest way to find them is to go directly to Amazon's Free Kindle Books store, which shows what's free right now in every category. You can also find free books through Project Gutenberg, Open Library, and ManyBooks — all three send books directly to your Kindle device or app.
Free books on Kindle fall into two groups: books that are permanently free (mostly older works in the public domain) and books that are temporarily free as part of an author's promotion. Temporary free periods usually last a few days, so the selection changes constantly. Permanent free books stay available indefinitely, which makes them more reliable if you're building a reading list.
Key Takeaways
- Amazon's Free Kindle Books store shows thousands of free titles organized by category, and you can filter by genre, language, and length.
- Project Gutenberg and Open Library have permanent free collections of older books that you can send directly to your Kindle device or app.
- Many authors run free promotion periods lasting a few days — websites like BookBaby and Freebooksy alert you when books in your favorite genres go free.
- You need an Amazon account and a Kindle device or the free Kindle reading app to read books sent to your Kindle.
- Public libraries often lend Kindle books through apps like Libby and OverDrive, which is different from free books but costs nothing.
Using Amazon's Free Kindle Books store
Start at amazon.com and search for "Free Kindle Books" or go directly to the Free section under Kindle Store. The page shows bestselling free books at the top, but you'll find more by using the filters on the left side. Click on a category like Mystery, Romance, or Science Fiction to narrow down what you see. You can also filter by language, book length, and how recently the book was added to the free section.
Each book listing shows whether it's permanently free or temporarily free. If a book says "Limited time offer," it will go back to a paid price in a few days — the listing usually tells you when. Read the description and customer reviews before sending it to your Kindle, since free books vary widely in quality. Once you find a book you want, click "Read for free" and choose which device or app to send it to.
The free selection on Amazon changes daily, so checking back regularly turns up different books. If you find an author you like, follow them to get notified when they run free promotions on future books.
Finding permanent free books through Project Gutenberg and Open Library
Project Gutenberg has over 70,000 free books, mostly classics and older works that are in the public domain. Go to gutenberg.org, search for a title or author, and download the book in Kindle format (.mobi). Then email it to your Kindle email address — Amazon will automatically convert it and send it to your device. You can find your Kindle email address in your Amazon account under Manage Your Content and Devices.
Open Library (openlibrary.org) works differently: you can borrow books for 14 days at a time, and many are available in Kindle format. Search for a title, click "Borrow," and it will send the book to your Kindle app or device. When the 14 days are up, the book disappears from your library automatically — you don't have to return it manually.
Both sites have search tools that let you browse by genre, publication date, or popularity. Project Gutenberg books are yours to keep forever once you download them, while Open Library books are temporary loans. Neither charges a fee.
Getting alerts for temporarily free books
Authors often run free promotion periods to build readers, and websites track when these happen so you don't have to check Amazon constantly. BookBaby (bookbaby.com/free-books), Freebooksy (freebooksy.com), and Smashwords (smashwords.com/books/category/1/any/any/free-ebooks) all list free books by genre and let you sign up for email alerts.
These sites update daily and show you which books are free for how many more days. You can filter by genre — romance, mystery, science fiction, and so on — so you only see alerts for books you actually want to read. Most of these services are free to use, though some offer paid premium alerts that filter more aggressively.
The downside is that free promotion periods are short, usually three to five days. If you see a book you want, send it to your Kindle right away rather than waiting — it may not be free the next time you check.
Sending books to your Kindle device or app
Every Kindle device and the Kindle reading app have an email address associated with your Amazon account. When you email a book file to that address, Amazon converts it and sends it to your device automatically. You can find your Kindle email address by logging into Amazon, going to Manage Your Content and Devices, clicking Devices, and looking for the email listed under your device name.
When you send a file, put the word "Convert" in the subject line if you want Amazon to convert it to Kindle format first — this works for most file types. If you don't include "Convert," Amazon will send the file as-is, which may not display correctly on older Kindle devices. Always send from an email address you've registered with your Amazon account, or Amazon will reject it.
From Amazon's Free Kindle Books store, you don't need to email anything — just click "Read for free" and choose your device. Amazon handles the rest automatically.
Using your library's Kindle lending service
Many public libraries lend Kindle books through apps like Libby and OverDrive. These aren't free books in the sense that Project Gutenberg offers them — they're borrowed, like physical library books — but they cost nothing if you have a library card. Search for a title in Libby or OverDrive, place a hold if it's checked out, and when it's your turn, the app sends it to your Kindle automatically.
Borrowed books disappear from your Kindle when the loan period ends, usually 14 to 21 days. You don't have to return them manually — they vanish automatically. If you love a book, you can place another hold and borrow it again later, or buy it if you want to keep it permanently.
Check whether your library uses Libby, OverDrive, or another service by visiting your library's website and looking for "digital books" or "ebooks." You'll need your library card number to set up an account.
What to watch out for when downloading free books
Not all free Kindle books are legitimate. Some are stolen copies or low-quality self-published works with poor editing and formatting. Before you send a book to your Kindle, read the customer reviews on Amazon — they'll tell you whether the book is worth your time. Look for reviews that mention formatting problems, missing pages, or copied content.
Stick to books from Amazon's official Free Kindle Books store, Project Gutenberg, Open Library, and reputable alert sites like BookBaby and Freebooksy. These sources vet what they offer, so you're less likely to run into stolen or corrupted files. If you download a book from an unknown website and it doesn't work on your Kindle, don't email it to your Kindle address — it may contain malware.
Some free books are actually the first book in a series, and the author uses the free book to hook you into buying the rest. That's not a scam — it's a legitimate marketing tactic — but know that you may end up wanting to buy later books to finish the story.
Frequently Asked Questions
Do I need a Kindle device to read free Kindle books?
No. You can read Kindle books on any device using the free Kindle reading app, which works on phones, tablets, and computers. Download the app from Amazon or your device's app store, sign in with your Amazon account, and books you've sent to your Kindle will appear automatically.
Can I share a free book I downloaded with someone else?
It depends on the book's license. Public domain books from Project Gutenberg can be shared freely. Books from Amazon's store are tied to your Amazon account and can't be transferred to another person's Kindle, though you can lend some books for 14 days if the author allows it. Check the book's product page to see if lending is turned on.
Why do some books say "Limited time offer" and then disappear?
Authors run free promotions for a few days to attract new readers, then the book goes back to its regular price. If you see a free book you want, send it to your Kindle immediately — once the promotion ends, you'll have to pay for it. You keep the free copy you already downloaded, but you can't get new free copies.
Is Project Gutenberg safe to use?
Yes. Project Gutenberg is a nonprofit organization that has been digitizing public domain books since 1971. All books are legal to download and distribute. The site doesn't require an account or payment, and it doesn't collect personal information.
What's the difference between borrowing from the library and downloading a free book?
Library books are loans that disappear after 14 to 21 days. Free books from Amazon or Project Gutenberg are yours to keep forever. Library books are newer and more popular, while free books are usually older classics or author promotions. Both cost nothing if you have a library card or an Amazon account.