William Ottens is a librarian from Lawrence, Kansas and creator of the library-centric Librarian Problems Tumblr. Described by Library Journal's Tumblr-in-Chief, Molly McArdle, as the GIF-king of all librarian tumblrs, William's Librarian Problems blog pairs common librarian situations, frustrations, and stereotypes with animated reaction GIFs. His public library experience includes work in reference, administration, cataloging, and collection development. He served as Director of the Oskaloosa Public Library in Oskaloosa, Iowa from 2012 to 2015, and is currently the Cataloging and Collection Development Coordinator at the Lawrence Public Library in Lawrence, Kansas. Ottens resides in Lawrence, Kansas.