The Night of the Solstice.
Lured to the forbidden house on the hill, Claudia asks Alys and the twins, Charles and Janie, to accompany her, and together they discover a spell that lets them pass through the house's mirrors into another world.
HEART OF VAPOR
Alys, Janie, Charles, and Claudia are drawn into a dangerous power struggle between the sorceress, Morgana Shee, and her archrival in this Arthurian sequel to The Night of the Solstice.