Baseline of being in prison at all would be pretty bad. Even if I just had Left Behind books, that might be preferable to being in the general population.
(I'm 99.9% certain you could get a bible, if nothing else -- while I'm an atheist, it would be interesting reading, if only to understand cultural references, and is quite long. Law books would be great, and there are legal arguments ensuring access to those, too.)
Some reading materials should obviously be censored (e.g. information about lock picking, practical drug recipes and violent pornography).
But not even the US prison system should want to limit prisoner's intellectual development! To help prisoners grow will make a subset of them productive members of society instead of parasites. Win-win.
Edit: I'm a European, but not dogmatic. My native Sweden should imho use harsher sentencing in some areas. But this was just ridiculously contra productive.
I don't know about you but I think I'd struggle to survive more than a day or two.