Here is one of the giants in book publishing. Penguin Putnam is a conglomerate of book publishers, including imprints Penguin/Putnam, Puffin, Signet, Viking, PaperStar, Frederick Warne, Berkley, Ace, Grosset & Dunlap, Mentor, ROC, Dial, Reader's Digest, Dorling Kindersley (DK), and others. Between them, these companies publish thousands upon thousands of books. We carry hundreds of titles from these various imprints, and regularly add more.