Some POD providers say they provide press proofs, but don't understand the term. A press proof prints on an offset press using 4 trays of ink: Cyan, Magenta, Yellow, and blacK. Plates are made of every signature (not single pages). We print an entire book and send it to the author for approval ... for free. Then we break down the press as we need it for other jobs. We wait for the author to approve. When any changes are made, we make new plates and print ... again. PODs output pages one at a time from an output device. This device prints smeary toner or fuzzy inkjet ... not ink on fine paper. At SPB, we include 1 full set of color digital proofs in your quote. They are also output from a digital output device, but we never call them press proofs because they are not. But, we offer real press proofs. We charge significantly for them, but press proofs are seldom necessary. That is because of our guidance in setting up files correctly, and great production teams with many years of offset book press experience. We watch color closely on our digital proofs, so they are acceptable for most photographers, art galleries, and museums.