Nectar of the Wicked by Ella Fields

Deadly twists and delicious romance—enter an all-new dark and highly addictive fantasy world from bestselling author, Ella Fields.

There is no escaping the middle lands, the gloomy buffer between the human kingdom and the faerie realms. When my guardian is killed by the Wild Hunt after waiting twenty years to trade me for her human daughter, I’m left with no choice but to try.
To find those who discarded me at birth, I must sneak into Faerie.
But my deceased guardian left more than scars upon my heart. Debts are owed to the madam at the Lair of Lust, and I’m forced to repay them.
My first client is a faerie king who offers to give me everything I’ve always wanted. The king will take me to Faerie if I make a blood vow to marry him. A collection of sweltering meetings fool me into believing his reasons for choosing me to be his queen—a changeling without so much as a name.
For upon my arrival in his kingdom, I receive the answers I’ve craved and the truth behind his motives.
My wonder and infatuation for the king and his wintry realm are snuffed by hatred and fear. Though loathing him is futile when venomous words and spiteful games only prove to excite him. Once again, I’m trapped. This time, with an enemy I cannot hide from. One with enough heat in his eyes to melt my resolve, and enough power at his frosted fingertips to accomplish his sinister goals.
To survive all I’ve discovered, not only will I need to unearth King Florian’s dead heart—I will need to guard my own before he tricks it, too.