The Allen County Public Library of Ft. Wayne, Indiana is well known for its impressive genealogical holdings. One way to access public domain works digitized by the library is by visiting their section of the Internet Archive. Publications may be viewed in their original form as scanned, read as text documents, or downloaded in a variety of formats including pdf, Kindle, ePub and others. The library’s portal page (see above link) features a list of the newest titles added as well as a ranking of the most popular downloads. The page also offers RSS of newly added content for those who use feed utilities. The more than 19,000 books, magazines and family histories in this collection may be browsed by title or discovered via keyword searches. Searches that include the county and state of your research are particularly useful for discovering out-of-print sources. Give it a try and report back on your successes in the comments.