Favorable reviews of the book might be featured on the back of the book, or there might be quotes about other books written by that same author. The dustjacket also reveals the book's imprint, which is also branded on the spine of the book itself. The imprint can be a couple of different things. Or an imprint could be the name of a subsidiary of a larger publishing house. If that's the case, you'll find the name of the publisher on the reverse side of the title page.
Many publishers also use specific imprints to publish a specific type of book.
For example, a book that was published in hardcover by Random House may be published in paperback under the imprint of Vintage Books, which is a division of Random House. Times Books, another division of Random House, publishes business and public affairs books. This is the ISBN, or International Standard Book Number, which identifies the publisher, binding and edition of a given book. The rest of the numbers identify the specific book and edition, and are assigned by the publisher. So now you know more than you ever thought you would about the book in your hands.