XX is a 2020 science fiction novel by writer Rian Hughes.
Hughes created a new typeface for the novel. Adapting the novel for e-readers was difficult, and Hughes considers the printed book to be the way the novel "should be read". Due to its use of graphic elements, artwork, a novel within the novel, asemic writing, and epistolary techniques, it can be considered a work of ergodic literature.
Neville Hawcock, writing for The Financial Times, praised the graphic elements of the book as an "enjoyable variation" from typical novels. Lydia Fletcher, in a review published by The Library Journal, criticized the novel as occasionally "difficult to follow" in part due to the "mixed-media" portions.