The Three Doors Trilogy
Emily Rodda

Three magic Doors you here behold Time to choose: Wood? Silver? Gold? Listen to your inner voice And you will make the wisest choice. The walled city of Weld is under attack from ferocious flying creatures that raid in the night, bringing death and destruction. The Warden calls for Volunteers to find and destroy the Enemy who is sending the invaders. The heroes of Weld answer the call one by one, never to return. Rye's brothers, Dirk and Sholto, are among the lost, and he must find them. Three brothers, three doors. What terrors await them beyond the Wall?