The Shadows Beyond by TJ Rose

Cinnamon ‘Cinn’ Saunders thought he’d learnt to control his little ghost problem.

That is, until the moment he brings back a malevolent spirit from the shadowrealm, and quickly finds himself unjustly arrested for the murder of four people.
After breaking free of foster care and a stint in juvie, all Cinn wanted to do was keep his head down and work his way up to become a professional chef. Now he’s forced to make a choice: life in jail, or allow a stranger to whisk him away to a mysterious institute in rural Switzerland with the promise of learning how to control his terrifying supernatural abilities.
Julien, the French charismatic charmer who is charged with warding over Cinn, also has a problem: the murder of his sister is still unsolved.
He needs help. Help that only Cinn can provide. He’ll do anything to get it, including making Cinn an offer that he can’t refuse. What Julien doesn’t expect out of the bargain is their undeniable connection, which only serves to complicate matters as they navigate uncharted territories together.
Between battling an uprising of deadly creatures that not only threaten the moteblessed community, but the entire planet, and fighting their ever-growing attraction, can this opposites-attract pair overcome their demons to save the world, and each other?