"In the past, the state regularly compiled a list of about 400 reports that agencies were required by the Legislature to produce. But the commission found more than 1,600, and state records administrator Michael Heskett is pretty sure his team hasn't found them all."(emphasis added)
So, even in 668 pages, they may not have found all the reports just yet. The news story comes from the Houston Chronicle for 10/29/2007. It is entitled "State Report Says Texas Has Too Many Reports."