River of Crows (en Inglés) - N.P. Thompson

A cryptic prophecy. A dangerous quest. An explosive family secret. And a crow with a white feather who is more than he appears...

Mortal peril is twelve-year-old Ty Baxter's new normal when he teams up with the weird girl from school to help an injured bird and suddenly finds himself trapped in a strange, magical world.

As Ty struggles to control his own emerging magical Talent, he and his new friends find themselves in a desperate gamble to save their missing families before the tyrant emperor of Arcania uses his dark sorcery to transform them into birds, enslaving them forever as soldiers in his enchanted avian army.

And if he survives all of that, he's probably still going to get grounded-if he ever finds a way to get back home.