Direct answer: Libby is a free app made by OverDrive that lets you borrow ebooks and audiobooks from your public library using only your library card number — no extra cost, no separate subscription.
Setting it up in under five minutes
Download Libby, search for your library by name, and sign in with your card number and PIN (the same one you'd use on your library's website). From there, browse or search the catalog exactly like an online bookstore, except everything is free to borrow.
How borrowing and holds work
Popular titles often have a waitlist, just like physical copies — placing a hold reserves your spot and the book downloads automatically when it's your turn. Loan periods typically run 7 to 21 days depending on your library's settings, and books return themselves automatically, so there are never late fees.
Multiple libraries, one app
You can add more than one library card to Libby if you qualify for cards in more than one system (for example, a home county and a workplace city), effectively doubling your available catalog and reducing wait times.
Libby vs. hoopla
Libby draws from your library's owned collection (so waitlists exist), while hoopla, offered by many of the same libraries, allows instant unlimited borrowing from a separate catalog with a monthly checkout cap. Using both together covers the most ground.
Do I need a library card to use Libby?
Yes, Libby requires an active public library card in good standing; some libraries also offer a temporary digital-only card if you don't have one yet.
Can I use Libby without owning a Kindle?
Yes, Libby works on iOS, Android, and web browsers, and can also send books to a Kindle in supported countries.
Is there a limit to how many books I can borrow?
Most libraries set a checkout limit (commonly 5–20 titles at once) plus a separate hold limit, both shown in the app.