The epic conclusion to the trilogy bestselling author Adam Gidwitz called "a wild fantasy adventure" find siblings Max and Carter embroiled in the final battle against the evil Grannie Yaga On the mysterious Summer Isle, siblings Max and Carter discovered the magical land where the villainous Pied Piper led the children of Hamelin centuries ago. They were trapped outside of time in a never-ending clash against a vicious rat army. After a desperate...