House of Lies and Sorrow by Emily Blackwood

Jade Farrow will die tomorrow.

Her fate was decided years ago, when her useless father made a deal with the greedy fae king to save his own life. Now, she is being sent to marry one of the five ruthless fae princes. The only problem is that she is not the first human to marry a fae prince. And like every human wife before her, Jade is going to be killed before she can find a way out.
Malachi Weyland is the heir to the fae throne. It’s the reason his brothers have despised him all these years, and it’s the reason his father is adamant on finding him a human wife. Malachi has one job, and that is to unite the fae and human lands. But Malachi has a secret, and it’s one that gives him his rightful name amongst both the human and fae lands: The Prince of Shadows.
Jade and Malachi are faced with life-or-death challenges as Jade is thrown into Malachi’s magical world. Will she die just like every wife before her? Or will Malachi, the same fae who is feared across all of Rewyth, be the one to save her life?