Hit the library. More than two-thirds of public libraries offer access to e-books, reports the American Library Association. The catch: Only one person can have access to a copy at a time, so you may have to wait a bit for new titles and bestsellers.
Read the classics. There are more than 1 million titles in the public domain; the copyrights on them have expired, which means you can download them free. Find them at sites like gutenberg.org, openlibrary.org and manybooks.net.
Check the bookstore. Search "free books" on bn.com for more than 2 million digital titles, or search "$0.00" at Amazon or iTunes. Also, take a look at Zero Dollar Books; the site tracks which of Amazon's Kindle bestsellers are currently free, a selection that changes regularly.
Borrow from others. Some e-books have a lending feature, which allows you to swap them with friends. Expand your circle of sharing with sites like Booklending.com and ebookfling.com.
Discover new authors. Free-eBooks.net offers no-cost books from new and independent writers.
NEXT: Get more from your cable provider