Amazing response! Thank you so much!
I mentioned AD/BC: A Rock Opera in another comment, that’s all I can offer, if you don’t know it already!

I’m trying to think of what I can also suggest and I’m left with AD/BC: A Rock Opera. It’s just a one-off 30 min special starring… everyone! I love it.

I also love John Dies at the End (and the couple of sequels I’ve read), and Garth Marenghi.
What other books do you recommend?

We did not.

Wake me up inside