The book was Carrie. You can make it out in a couple of screen shots, here...

http://lost.cubit.net/forum/index.ph...sa=view;id=170

It's got that nice telekinesis theme going on. It also connects with Benry's comment to Locke, "you don't have any Stephen King do you?". Benry made this comment when Locke gave him the Dostoyevsky book to read.

As for the "when" timeframe, there are a couple of different covers of the book, so I don't think that's gonna help you.