I use this website to find backlogs of items that I am trying to look for. Or items I own trying to cross reference them with goodreads. This website is a required resource for all those seeking books. So far in my 500 or so books I've looked up, <5 self-published items I have been unable to find. This website has practically ever book ever published from what I can see.
One of the most awesome places to find resources, books and materials! Not only can you find almost any book, it will cite the book, and tell you where you can find it in your area. Awesome and safe to use from my experiences!