There are numerous Web sites offering free eBooks in html or pdf formats. Here are some of the largest websites, but there are many more.
Project Gutenberg -Download books in the public domain (out of copyright). Browse by popularity, genre, and subject. Can transfer to or directly use on a portable deviceThe State Library is unable to provide instructions for all free downloadable book sites. Project Gutenberg is the oldest free ebook provider on the internet. Many sites use their texts or download books in similar ways.
The Online Books Page -Listing over 1 million free books on the Web
Internet Archive -Includes permanent access for researchers, historians, scholars, people with disabilities, and the general public to historical collections that exist in digital format.
ManyBooks -Searches free ebooks from around the web. Converts the free books to more formats than they would previously have been available.
AddAll Books -Free ebook browsing includes eHarlequins.
OpenLibrary -Create an account, then check out ebooks which can be read in your browser or download to your computer. A project of Internet Archive.
BookBub -Browse for free ebooks by subject, or sign up to receive alerts for free books and discounts in categories you like.
Inkmesh-Book search that includes a browse by subject alongside promotional free ebooks from companies including Baen (science fiction).