XX: A Novel, Graphic

At Jodrell Bank a mysterious signal of extraterrestrial origin has been detected. Artificial Intelligence expert Jack Fenwick thinks he can decode it. But when he and his associates at Hoxton tech startup Intelligencia find a way to step into the alien realm the signal encodes, they discover that it's already occupied - by ghostly entities that may come from our own past.

Have these `DMEn' (Digital Memetic Entities) been created by persons unknown for just such an eventuality? Are they our first line of defence in a coming war, not for territory, but for our minds?