Defy the night
(Book)

The kingdom of Kandala is divided by corruption, and a sickness is ravaging the land. The only known cure to the sickness is an elixir made from delicate Moonflower petals, which are delicate and limited. King Harristan was thrust into power after his parents' assassination; the younger Prince Corrick takes on the brutal role of the King's Justice. The brothers have learned to react mercilessly to any sign of rebellion. Out in the Wilds, apothecary apprentice Tessa Cade watches her neighbors die; every night, she and her friend Wes risk their lives to steal Moonflower petals and distribute the elixir to those who need it most. A cruel act from the King's Justice makes Tessa risk everything-- but what she finds may destroy the kingdom. -- adapted from jacket

Ages 13.,Bloomsbury Children's Books.