Google has been testing a new service which will search the texts of published books, thereby imitating and rivalling the recently launced service from amazon to do the same (see recent blog entry following on from Tyndale Tech). It's not been launched with any sort of major fanfare but news features have begun to appear on this over the last day or so, e.g. this one at ZDNet:
Google tests book search
And Google itself has a short page here:
About Google Print (BETA)
The latter has the following great introduction, "Google's mission is to provide access to all the world's information and make it universally useful and accessible. It turns out that not all the world's information is already on the Internet, so Google has been experimenting with a number of publishers to test their content online."