Top book printers -- El-Hi, Trade Fuel Optimism

Another segment that has made manufacturers optimistic is the trade sector, spurred by the release of the sixth Harry Potter book.

"(Trade) can be influenced by the big books that (are released) every year," Clarke says. "There are 10 or 12 books that seem to have a life of their own and sell millions—some of which you can count on, and some of which are surprises."