The Elven Healer’s Apprentice by Elisa Rae

Merlon, the king of Eldarlan’s healer, hides his soft heart beneath a prickly exterior. Despite a traumatic childhood, he strives to excel as a healer and an elf. But he gets more than he bargained for when he rescues a human woman from certain death right before being snared in the curse put on the king of Eldarlan.
Left to fend for herself in an absent elf healer’s compound, Adela tries to be useful. The patients call her the healer’s apprentice. Something the healer rejects when he finally returns. Despite his grumpy manner, the healer displays a strange mixture of kindness and care. Intrigued, Adela suspects the healer hides more than he reveals.