Fire wants to devour; when it's inside you, you find fuel, or you become fuel

Enna Burning - Shannon Hale

This second book switches gears from a very fairytale-feeling classic fantasy to something entirely new. A side character in book one steps into the spotlight when her struggles to contain the raging power of fire propel her into the midst of a war. Enjoyable, but also upsetting, the narrative is slightly more mature and 'teen' than book 1, with a gaslighting scoundrel of an enemy captain taking up a large amount of the runtime.