Looking for imagery for your book cover? Creative Commons features a library of more than 300 million images, indexed from 19 different collections, including the Cleveland Museum of Art, Metropolitan Museum of Art, DeviantArt, Behance, and Flickr. Images can be searched using keywords and filter the results based on the license type and/or the collection from which the content is sourced, essential for book design — as the vast majority of covers require commercial licenses.