How to Get Books on Your Kindle Device or App

The three ways to get books onto your Kindle

You can put books on your Kindle through the Amazon store (the most common route), by sending files directly to your device, or by borrowing from a library. Which one works depends on what book you want, whether you own it already, and whether you have a library card.

The Amazon store is built into every Kindle device and app — you search, buy or borrow, and the book lands on your device in seconds. If you already own a book file on your computer (a PDF, EPUB, or other format), you can send it to your Kindle using Amazon's email service or a USB cable. Library lending works through apps like Libby or OverDrive, which sync with your Kindle if your library supports it.

Each route has different limits. Amazon books are DRM-protected, meaning you cannot copy or share them. Library books expire after the loan period. Files you send yourself must be in a format your Kindle reads, and conversion sometimes changes how the book looks.

Key Takeaways

The Amazon store is built into your Kindle device or app — search for a title, buy or borrow it, and it appears on your device within seconds.
You can email book files (PDF, MOBI, AZW) directly to your Kindle using a unique email address Amazon assigns to your device.
Library apps like Libby let you borrow books that sync to your Kindle if your library participates in the lending program.
Amazon books are locked to your account and cannot be shared, copied, or transferred to other devices.
Converting files from one format to another (like EPUB to MOBI) sometimes changes spacing, fonts, or page breaks.

Buying or borrowing from the Amazon store

Open the Kindle app or device and tap the store icon (usually a shopping bag or "Store" button). Search for the book title or author. When you find it, you will see the price — some books are free, some cost money, and some offer a free trial period through Kindle Unlimited, Amazon's subscription service.

Tap "Buy" or "Borrow" (if your library offers borrowing through Amazon). The book downloads to your device immediately. You own the book permanently if you bought it; if you borrowed it, it returns automatically after the loan period (usually 14 days) and disappears from your device.

If you do not see a "Borrow" button, your library does not participate in Amazon's lending program. In that case, use Libby or OverDrive instead (see the library section below).

Sending files from your computer to your Kindle

If you have a book file already on your computer — perhaps a PDF you created, a file you bought elsewhere, or a book you own in digital form — you can send it to your Kindle using Amazon's email-to-Kindle service.

First, find your Kindle's email address. On a Kindle device, go to Settings, then Device Options, and look for "Send-to-Kindle Email". On the Kindle app, go to Settings (the gear icon), then Account Settings, and find "Send-to-Kindle Email". Write down the address — it looks like yourname@kindle.com.

Attach the book file to an email and send it to that address. Kindle accepts PDF, MOBI, AZW, AZW3, and a few other formats. The book will appear on your device within minutes. You can also convert EPUB files (a common format for library books and indie publishers) to MOBI or AZW using free tools like Calibre, though the conversion sometimes shifts how the book looks on screen.

One limit: files sent this way are not backed up to your Amazon account the way purchased books are. If you delete the book from your device, you will need to email it again to get it back.

Borrowing books through your library

Most public libraries in the United States offer digital lending through apps like Libby (owned by Overdrive) or OverDrive itself. These apps let you borrow ebooks that can sync to your Kindle.

Download Libby or OverDrive on your phone or tablet, then sign in with your library card number and PIN. Search for a book. If it is available, tap "Borrow". If it is checked out, you can place a hold and get notified when it becomes available — wait times vary from hours to weeks depending on how many people are ahead of you.

Once you have borrowed a book, open it in the Libby or OverDrive app. Look for a "Send to Kindle" button or option (not all libraries support this yet — check your library's website first). If the button exists, tap it, select your Kindle device, and the book syncs over. The book will return automatically on the due date and disappear from your Kindle.

If your library does not support sending to Kindle, you can still read the book in the Libby or OverDrive app itself, but it will not appear on your Kindle device.

Understanding file formats and conversion

Kindle devices and apps read several file formats, but not all. MOBI and AZW are Kindle's native formats and work perfectly. PDF files work but may not reflow text to fit the screen, so you might have to zoom or scroll. AZW3 is Amazon's newer format and supports better formatting.

EPUB is the standard format for library ebooks and many indie publishers, but Kindle does not read it directly. You can convert EPUB to MOBI or AZW using free software like Calibre. The conversion usually works well, but complex layouts, embedded fonts, or unusual formatting sometimes break or shift during conversion.

If you are not sure what format a file is, right-click it on your computer and look at the file extension (the letters after the dot). If you are unsure how to convert it, Calibre has guides for each format, or you can search "[filename] to Kindle" online to find step-by-step instructions.

Troubleshooting books that do not appear

If you bought a book from Amazon but it is not showing up on your device, first check that you are signed into the same Amazon account on your Kindle. Go to Settings, then Account, and verify the email address matches the one you used to buy the book.

If the account is correct, go to the Kindle store, search for the book, and look for a button that says "Read for Free" or "Read Now" instead of "Buy". Tap it, and the book should appear on your device within a few minutes. If it still does not show up, restart your Kindle (turn it off and on again) or close and reopen the Kindle app.

For files you emailed to your Kindle, check that you sent them to the correct Send-to-Kindle email address. Also verify the file format is one Kindle accepts — if you are unsure, convert it to MOBI using Calibre first. If the file is very large (over 50 MB), Amazon may reject it; in that case, try compressing the file or breaking it into smaller parts.

Managing storage and organizing your library

Kindle devices have limited storage. Older Kindles have 4 GB; newer ones have 8 GB or more. Books take up space, especially if they include images or are very long. If you run out of space, you can delete books from your device (they stay in your Amazon library and can be re-downloaded later) without losing them.

To organize your books, create collections on your Kindle. On a Kindle device, go to the Home screen, tap the menu icon (three horizontal lines), and select "Create New Collection". Name it (for example, "Science Fiction" or "To Read") and add books to it by holding down on a book title and selecting the collection. On the Kindle app, tap the menu icon and look for "Collections" or "Organize".

You can also manage your library from Amazon's website. Go to amazon.com, sign in, and click "Your Content and Devices". From there you can see all your books, delete them, send them to a specific device, or organize them into collections that sync across all your Kindles and apps.

Frequently Asked Questions

Can I read library books on my Kindle if my library does not support Send to Kindle?

Yes, but not on your Kindle device itself. You can read library books in the Libby or OverDrive app on your phone or tablet. Some libraries are adding Send to Kindle support, so check your library's website or ask a librarian whether they plan to offer it.

What happens to a book I bought if I delete it from my Kindle?

It stays in your Amazon library. Go to amazon.com, click "Your Content and Devices", find the book, and click "Deliver" to send it back to your Kindle. You can do this as many times as you want — you own the book permanently.

Can I share a Kindle book with someone else?

No. Amazon's DRM protection locks each book to the account that bought it. You cannot copy, share, or transfer it. The person would need to buy or borrow their own copy.

Why does my EPUB file look strange after I converted it to read on Kindle?

EPUB and Kindle formats handle fonts, spacing, and images differently. Calibre does its best to convert, but complex layouts sometimes shift. Try opening the converted file in Calibre's preview window before sending it to your Kindle to see how it will look.

How long can I keep a library book borrowed on my Kindle?

Most library loans are 14 days, though some libraries offer 7, 21, or 28 days. Check the due date in the Libby or OverDrive app. The book returns automatically — you do not have to do anything. If you want to keep reading, you can place a new hold and borrow it again when it becomes available.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.