The Promise of Forever — Crystal Cabrae

Having survived the war that ripped away everything she ever knew, Lela Porter doesn't scare easily. Except when she has nightmares of Aven, the boy lost before the war began. But when Lela comes home one night to find her little sister Ishandra taken by Officials, her whole world is turned around once again. Accompanied by her delusional older sister Amani, her best friend Seth, Ishandra's best friend Tucker, and the one and only Astor Amrosa, Lela leaves behind the life they have made in the Outcasts to track down the Revelation, the only lead they have to find Ishandra. In the process they reunite with old friends, unveil the truth of the country, and question the future as everything they know slowly becomes undone.