...but since you didn't, you may still have time.
By now you should be aware that the rapture happens tomorrow at 6pm ET (check your tv guide for local times). The Anchoress has done a great job collecting all of your last days reading.
While I'm not expecting to be raptured, being an evil Catholic and all, I thought that I would provide you with a reading list of things that all of you non-raptured people will want to read before the world really ends in October. I realize that there will be earthquakes and great suffering between now and then but if the Post Office is delivering (they don't include the apocalypse in their delivery guarantee), you may be able to take your mind off of your horrible suffering with some of these selections.
First, we should start off with some humorous reading. Since you'll be sitting in the wreckage of your house while your neighbor gets whisked away, you'll get a good laugh at how wrong are the various Catholic authors who have written about the rapture. That David Currie? He sure is funny when he talks about this whole destruction of Israel by Rome in the Book of Revelation! You may also get a chuckle out of What Does the Bible Say About the End Times? and Will Catholics be Left Behind?.
If you want some lighter apocalyptic fare, I recommend Lord of the World and Father Elijah. Both are available as instant e-book downloads in case you may get raptured tomorrow evening. I've read both books multiple times and in spite of there not being a rapture in either, they do tell a great yarn about the last days.
Since you have a few months before the world actually ends, you might want to do some reading on the Four Last Things (Death, Judgement, Heaven, Hell). Hell (and Other Destinations) I'm recommending on the strength of the cover. I also recommend Preparation for Death by St. Alphonsus Liguori. This is an abridged version which may be just right since your chances of living until the final judgement will be decreasing rapidly over the next several months.
Seriously, the apocalypse for any of us could happen at any moment (something about roaring lions comes to mind) so constant vigilance is always a good thing. What I really recommend is to go pick out one of our good books on Confession. We don't sell any bad ones. Depending on your time zone, you can probably make it to confession before 6pm ET tomorrow.