For the last few years I've read a few books in October that are in the spirit of Halloween. This year I have waited until the last moment and have just started Hellboy Library Edition Volume 4, which I put off reading until October solely for it's Halloween-ness. Last year I read the Marvel Zombie's Omnibus (Zomnibus) to get me in the spirit. I also just finished up the Incredible Hulk Omnibus, but it really didn't ever get too outside of science to qualify for me.
Does anyone else read books that get them into the spirit of Halloween? (or any other holiday)
As an aside, I'll always think of the X-men crossover Fatal Attractions as a Halloween book because I first read those stories on Halloween years ago when it was first published. I saved up all the issues so that I could read them in a row and had a blast.