Book excerpt: A pair of supernatural mysteries from National Book Award winner Judy Blundell. Gracie has premonitions. They've haunted her since before her mother's death, and she can't get rid of them. She doesn't know how to deal with them and she doesn't want to--they've never led to anything good. She never knows whether she's seeing the past, the present, or the future--it just comes to her. But Gracie is forced to try to use her premonitions. Her best friend, Emily, disappears, and the premonitions lead to the only clues to where she might be--and how she might be saved. Gracie's long-absent father returns, and his history seems mysteriously linked to the disappearance of a