The House in the Cerulean Sea by T. J. Klune

Linus Baker leads a quiet, solitary life. At forty, he lives in a tiny house with a devious cat and his old records. As a Case Worker at the Department in Charge Of Magical Youth, he spends his days overseeing the well-being of children in government-sanctioned orphanages. When Linus is unexpectedly summoned by Extremely Upper Management he's given a curious and highly classified assignment: travel to Marsyas Island Orphanage, where six dangerous children reside: a gnome, a sprite, a wyvern, an unidentifiable green blob, a were-Pomeranian, and the Antichrist. Linus must set aside his fears and determine whether or not they’re likely to bring about the end of days. But the children aren’t the only secret the island keeps. Their caretaker is the charming and enigmatic Arthur Parnassus, who will do anything to keep his wards safe. As Arthur and Linus grow closer, long-held secrets are exposed, and Linus must make a choice: destroy a home or watch the world burn. An enchanting story, masterfully told, The House in the Cerulean Sea is about the profound experience of discovering an unlikely family in an unexpected placeβ€”and realizing that family is yours.

The Reluctant Queen (The Queens of Renthia #2) by Sarah Beth Durst

After Queen Daleina discovers that she needs an heir more quickly than she thought, she sends her champions out to find powerful young women who could take on that role. Naelin is not young, nor does she think she is powerful, but after Champion Ven sees the depth of her strength, he believes she is the heir Renthia needs, even if she wants no part of her powers.

A Song of Wraiths and Ruin (A Song of Wraiths and Ruin #1) by Roseanne A. Brown

After the death of her mother, Karina is desperate to bring her back so the ruling of their country doesn't fall on her. In order to complete the ritual, she needs a king's heart. Malik's younger sister was taken by a spirit and the only way to get her back is to kill the princess, Karina. He enters into a competition where the prize is her hand in marriage in order to get close to her.