: Allows you to borrow ebooks and audiobooks from your local public library for free using your library card. [7]

: The industry standard for most e-readers (except older Kindles). It is "reflowable," meaning the text adjusts to fit your screen size.

Depending on your device and reading preferences, several major retailers dominate the digital book market:

: Many purchased books come with Digital Rights Management (DRM), which may limit your ability to move the file between different brands of devices.

: Proprietary formats used by Amazon Kindle devices. Where to Find Free Legal Downloads

: Best for textbooks or highly illustrated books where maintaining the exact original layout is crucial.