Rowan and the Keeper of the Crystal (Rowan of Rin #3)

 'The Crystal dims. The Chooser is summoned...' When the man from the distant land of Maris delivers his mysterious message to the people of Rin, Rowan is shocked to discover what it means to him. Within hours he is travelling far from home, all the way to the glittering sea, and into the strange world of the Maris people. There, caught up in mystery and intrigue, Rowan must try to fulfil an ancient promise. But who can he trust? And is he brave enough to face the terrors ahead?