: Starting in January 2026 , Amazon began allowing verified purchasers of DRM-free Kindle eBooks to download their purchases as EPUB or PDF files . This move has significantly increased the portability of contemporary EPUB indexes for users previously locked into the Kindle ecosystem.

: A critical resource for academic and scholarly work, DOAB recently updated its visual identity and currently indexes over 106,500 peer-reviewed books .

: Aiming to provide a "page for every book ever published," its index includes over 1.7 million public domain titles and millions more available for digital borrowing.

: As the oldest digital library, it remains a primary source with over 78,000 titles . Its index is updated daily with new public domain additions, primarily classics.

: This project is highly recommended for those who prioritize formatting. It takes public domain works from Gutenberg and applies professional typography and modern EPUB standards, creating a "best-of" index for high-quality reading.

: A diverse index of over 50,000 titles that mixes public domain classics with free works from contemporary indie authors. New Market Developments in 2026

Experienced digital archivists often use advanced search strings to find open directories (unprotected server folders) containing EPUB files. These are typically found using: Top 10 Free Ebook Download Sites You Should Know in 2026

: For those tracking the "next" index, Library Journal provides downloadable spreadsheets for forthcoming titles as far out as June 2026 , allowing collectors to anticipate new releases. How to Search for "Index Of" Directories