Ok, this is just a bit gratuitous. Jennifer Fallon cites a webpage for an online bookstore that asks readers to select their favorite sub-genre of speculative fiction. The only problem I see with this list is how unbelievably large it is – they give 51 sub-genres, several of which are enough to warrant at least a raised eyebrow. I would suggest that, rather than being classified as sub-genres of SF(speculative fiction), these might be better classified as aspects of the genre as a whole, since many of them you will find together in the very same story or novel. And a couple of them just make you have to shake your head in disbelief that anyone would ever possibly consider that one a sub-genre of SF(speculative fiction).