Always order the sample book.
Just had my first book printed by Lulu arrive in the mail, very exciting. The cover is using a placeholder image just to see how it printed, report on that, they are amazing. The main points I found: i discounted my blank pages and have to add one blank page to get the chapters starting in the right place. And this one was my main focus for the sample can I read the tables, charts and images. And what I found was 1 out of 4 worked and the rest are like Bible print. The value if the sample is now I know, I have a direct reference of what to fix and exactly where it is, best six bucks of education I have ever paid. The good news is the spine layout worked, even the logo on the spine which I was worried would look like a few white squiggles and unrecognizable.