Lud-in-the-Mist by Hope Mirrlees

Lud-in-the-Mist – a prosperous country town situated where two rivers meet: the Dawl and the Dapple. The latter, which has its source in the land of Faerie, is a great trial to Lud, which had long rejected anything ‘other’, preferring to believe only in what is known, what is solid. Nathaniel Chanticleer is a somewhat dreamy, slightly melancholy man, not one for making waves, who is deliberately ignoring a vital part of his own past; a secret he refuses even to acknowledge. But with the disappearance of his own daughter, and a long-overdue desire to protect his young son, he realises that something is changing in Lud – and something must be done.