Notes From Blue Mountain — Linda Lowery Keep

Hannah is hard at work writing a scary story for school when she suddenly finds herself listening to spooky stories in a firelit cabin in the Appalachian Mountains. As everyone prepares for the upcoming autumn festival, Hannah must help Annie, a girl her own age, who suspects that her brother Rufus has been kidnapped. Piecing together clues sent by the angels, Hannah and Annie brave all kinds of dangers--including a stormy encounter on a precarious bridge--to bring Rufus safely home.