Project Gutenberg provides access to over 33,000 free ebooks to read on your PC, iPad, Kindle, Sony Reader, iPhone, Android or other portable device.
Once a title has been found, download links are available.
Google Books provides the full text of books no longer covered by copyright, and some pages and snippets from other books.
Google Books can be a valuable source of information, as long as the user understands that not all books will be available in their full-length form, and that not all pages or snippets can be printed. Some older issues of popular magazines are also available.
Google Books Advanced Search.