If you are a fan of The Locked Tomb series, you will love this story (or vice versa). It straddles on new adult (with a bit more YA writing, but dealing with adult themes) and at 25 is a really good read, and I think if I read this at 18 it would've been life changing. I love all of the queer representation and how its incorporated as part of the characters rather then being "the gay" one (you know that stereotype?). 

Highly recommend!