Psychotic Obsession by Leigh Rivers

LOVE IS DANGEROUS
TRUST IS A WEAKNESS
POSSESSION IS A TOXIC GAME
Sweet and gentle.
Calm and collected.
Nervous and inexperienced.
He was death cloaked in the form of a handsome man, and instead of running the other way the first chance she got, she fell for him.

Aria Miller is a scientist searching for the cure for a rare genetic disease when her world turns on its head – she collides with Tobias Mitchell. When she takes him on as her assistant, he becomes infatuated with her in ways he knows he shouldn’t be.
Then, reality hits, and Aria is forced to leave the country. Faced with the thought of losing the object of his obsession, Tobias’ mask slips, showing her his true self for the first time.
Aria is his, and he’ll do anything to make sure she stays that way.

This is an interconnected standalone set before The Edge of Darkness Trilogy