Well, in this age of zillions and zillions of works flooding the market in any given genre, sometimes it helps to single out those things which distinguish a book from its neighbours on the virtual shelf and then people can zero in on the stuff they particularly want to read.
Your pick-up truck, prison, and space ship can be found in John DeChancie's
Starrigger trilogy, by the way.
But it has no gay demonslaying paranormal romantic sexyfuntimes that I know of. Admittedly, I haven't read my copy yet.
However, Rule 34 will automatically guarantee someone will come up with a porno mashup in no time flat.