Host Rides Out — Celia Rees

A psychic storm rages and ghosthunters stalk the city where young Davey Williams lives, destroying good and evil alike. Davey risks his own life to save his friends, but will the ghosts be there when he needs them? And now the Lady has returned, brimming with malice and hungry for vengeance. Davey must escape her deadly clutches by Midsummer, or be in her thrall forever...