The harp and the ravenvine : The Keepers #2
(Book)

Title and description based on researched data.

"In the world of the keepers, it's best not to speak in terms of the impossible. Horace F. Andrews, Keeper of the fabled Box of Promises, knows that nothing is impossible. After all, he has the ability to see into the future, and his friend Chloe can walk through walls. But before either of them can master their Tan'ji--their talismans of power--a new threat looms over all Keepers, and they must prepare to battle their eternal enemies--the Riven. Far away, drawn by an irresistible summons, a mysterious girl is making her way to the Warren, the Keeper stronghold. She wears the Ravenvine and is learning to wield its fascinating power; but this Tan'ji is damaged. There's no telling what will happen to the instrument or its Keeper if it cannot be made whole again. April's journey is long and dangerous, with strange new companions at her side and a pack of sinister hunters tracking her. Will she reach the Warren in time, and is it a safe haven, or will it offer only more danger? Ted Sanders's magical series began with The Box and the Dragonfly and continues with this powerful sequel that expands the extraordinary world of the Keepers, where nothing is ever ordinary and three words rule: Curiosity. Discovery. Possibility."