Okay, okay. But hear me out-- there are really only two authors I read that I would consider "guilty pleasures." There's no good reason to ever feel guilty about reading, even if it's strictly for pleasure. But when you read something that is not only pleasurable but also just plain bad and bad for you, then you might be justified in feeling some guilt. For me, that's George R.R. Martin and Ayn Rand. I'm not sure either one needs much explaining, but the Game of Thrones books (or Song of Ice and Fire books if you're a nerd) are pretty violent and misogynistic, and I normally can't abide genre fiction, but those books just sucked me in.
Ms. Rand on the other hand, is a bad writer and sort of an immoral person, which is why I felt so guilty reading The Fountainhead. which I'm still embarrassed to admit I gulped down in a week. I read it immediately after finishing grad school, when I had lots of time on my hands and was depressed about my employment prospects. I wanted to read something huge, for its own sake, and I picked The Fountainhead. I knew going into it that I had missed the boat-- I was way too old to be indoctrinated into the cult of Ayn Rand, but that almost made it even more pleasurable. It is so silly and the prose is just obnoxiously, deliciously overwrought. Nora Ephron has a terrific essay on it, probably some of the best literary criticism on Ayn Rand I've read, and there are more posts on Nora Ephron coming up, so I highly recommend you check it out.
I read Anthem in high school with the delusional idea that I would submit an essay for the Ayn Rand Institute essay contest, which now that I think about it-- Why are we letting them insert themselves into public education in this way?! But anyway, I never wrote an essay, because I thought the book was pretty dumb-- but I still raced through it and kinda secretly enjoyed it.
I haven't yet read Atlas Shrugged but I have every intention of doing so, again, partially just for the sake of reading a gigantic book. I've already been considering what will happen after #ReadWomen2014 is over (chronologically, that is. Reading women will never actually stop for me), and reading enormous books for the blog is one idea I've been tossing around. I will obviously need to start reading much, much faster in that case, but Atlas Shrugged would definitely make the cut.
If schadenfreude is more your cup of tea, try a good biography of Ayn Rand, which will provide plenty of anti-Rand ammunition. As obnoxious as her belief system was, she was still a pretty fascinating public figure, so this is more on the pleasure side, less of the guilt.
For those who reject my premise of Ayn Rand as guilty pleasure altogether -- here is George Saunders mocking Ayn Rand, which is just pure pleasure in every sense and another ringing endorsement for George Saunders.