Print on demand is great, you can make all those books you always dreamt of. That's the theory. Between your book and the theory there's Blurb. Sometimes they get it right, sometimes they don't. You can get a book with too many pages, you can get a book with missing pages. You can get a book with wrong colours, you can get a book that isn't cropped correctly. You can get a book with text or photos not at the position where they are supposed to be. There are unlimited possibilities to get it wrong. Not so with Blank. It doesn't really matter if the book isn't cropped correctly. Colour is not an issue, nor are text and photos. A few missing pages are not a problem and too many pages are not a problem either. The book is blank. You can do with it what you want. So can Blurb. If you don't like their logo, simply tear out the last page.
Customers who liked Blank also liked The Black Book: http://www.blurb.com/bookstore/detail/1768873