Prince of Frogs - Curse of the Dark Kingdom, #1

At the moment tyrannical King Aegron the Cruel was assassinated, each of his children was struck by a different dark curse.  Five years later, the Dark Kingdom is struggling to survive. The Royal Family of Darkhar is responsible for most of the misery suffered throughout the Five Kingdoms. And Evonna's experienced it first hand. In a desperate devils bargain, she agrees to assassinate the Dark Kingdom's notoriously cold-blooded and callous Frog Prince in exchange for help in finding her missing brother. But as she works her way closer to Alaistar, she discovers the cursed prince isn't the monster she's been led to believe.
And now she doesn't know if she wants to kill him... or kiss him. This Frog Prince inspired fantasy romance novel features a ruthless cursed prince, a reluctant assassin searching for her brother, enemies falling in love, and a mysterious magical cat.