“There is only one genre in fiction, the genre is called book.”

Interview with Weird Tales (24 May 2007) http://weirdtales.net/wordpress/2007/05/24/george-rr-martin-on-magic-vs-science/
Context: I think that for science fiction, fantasy, and even horror to some extent, the differences are skin-deep. I know there are elements in the field, particularly in science fiction, who feel that the differences are very profound, but I do not agree with that analysis. I think for me it is a matter of the furnishings. An elf or an alien may in some ways fulfill the same function, as a literary trope. It’s almost a matter of flavor. The ice cream can be chocolate or it can be strawberry, but it’s still ice cream. The real difference, to my mind, is between romantic fiction, which all these genres are a part of, and mimetic fiction, or naturalistic fiction.

interview with 3am http://www.3ammagazine.com/litarchives/2003/feb/interview_china_mieville.html

"The Mustard magazine interview" (January 2005)
Context: Life isn’t divided into genres. It’s a horrifying, romantic, tragic, comical, science-fiction cowboy detective novel. You know, with a bit of pornography if you're lucky.

"Elizabeth Hand on Mortal Love at HarperCollins (2004)
Context: I never think about genre when I work. I've written fantasy, science fiction, supernatural fiction, and am now working on a suspense novel. Genres are mostly useful as a marketing tool, and to help booksellers known where to shelve a book.

DC Comics interview http://www.dccomics.com/features/vertigox/vaughan.html

Source: Kate Nash calls out 'sexist' record shop for 'females of all description' category, 1 September 2016, The Independent, Jess, Denham https://www.independent.co.uk/arts-entertainment/music/news/kate-nash-calls-out-record-shop-for-sexist-labelling-after-spotting-females-of-all-description-a7219586.html,

Propylaea (1798) Introduction