Beneath the Dust: Force of Nature, Book 4 (Unabridged‪)‬

Piper Jones is in a real jam. Her dangerous journey from powerless orphan to the Princess of Faerie has brought her to a perilous crossroads. The fey king's minions are stealing witches from right under her nose, and her mother, the fey queen, has come to collect on her favor - one with potentially devastating consequences for everyone she loves. Piper's next move could be her last, and whatever her decision, one thing is clear:

The fey king and queen must die.