Here are solid places to find free ebooks:

  • Project Gutenberg — over 75,000 free ebooks, mostly public-domain classics, with EPUB and Kindle downloads.
  • Open Library — a large online lending library with free borrowing for many titles.
  • Internet Archive — useful for public-domain, historical, and out-of-print books.
  • [Libby / your local library] — lets you borrow ebooks and audiobooks free with a library card.
  • ManyBooks — a large catalog of free ebooks in common reading formats.
  • BookBoon — especially good for textbooks and business/learning books.
  • LibriVox — free audiobooks, if you want to listen instead of read.

Best picks by use

  • For classics: Project Gutenberg.
  • For borrowing newer books legally: Libby or Open Library.
  • For school or business reading: BookBoon.
  • For audiobooks: LibriVox.

Quick note

Stick to legal sources, especially for recent books, because many “free ebook” sites only offer public-domain titles or library lending. Project Gutenberg is especially straightforward since it offers free downloads without registration.

TL;DR: Start with Project Gutenberg and Libby, then use Open Library and Internet Archive for a bigger range of titles.