WMG / Thesupernaturalist

Stefan and Ellen were involved sexually.
When these two met in the observatory Cosmo thought he saw Stefan blushing when he and Ellen were catching up.
The Supernaturalist takes place in the "Artemis Fowl" series' future.
At one point, Faustino mentions Phonetix, a company that was in the third book of Artemis Fowl.
  • That might mean the "exploding microchips Holocaust" in the last book is responsible for the dystopian state of the world in "Supernaturalist".
The Supernaturalist takes place in "The Wish List" 's future
It is mentioned by Faustino that (paraphrasing) "a Myishi hasn't been at the helm of this company for years", and if it is in the same universe as The Wish List there is at least one Myishi helping to devise Eternal Solutions to Infernal Problems for the forces of Hell.