I recently had a book printed by Blurb and was not happy with the colors. This is only the second time I have had a POD book done. The last time was with MyPublisher, in which case the color might have been better, but it was adequate for the purpose at the time. I am familiar with how my photos look as inkjet prints and in halftones, but I have little experience with digital printing, other than from some quick-and-dirty brochures in which my photos sometimes get used, so I don't really know how critical I can be. I realize that there will be some variation with digital prining, compared to half tone, but I did not expect to see it within one copy of a book. In the case of one photo, which was on the cover as well as inside the book, the was a very distinct color difference that is unacceptable to me. This did not happen with MyPublisher. Is there any way to quantify the limit of the variations one might expect from this process, assuming the producer is conscientious about controlling variations to the extent the process allows? Blurb seem to one of the preferred producers of POD books, so I would assume that they are a good reference point.