Obsidian Mirror Author:Catherine Fisher When Jack's father disappears while working on mysterious experiments with the recluse, Oberon Venn, Jack is convinced Venn has murdered him. But the truth is far stranger ...Soon Jack is sucked into Venn's fixations about re-entering the past and changing it, with people pursuing him through time, and with a tribe of elemental beings who surrou... more »nd his isolated estate, fey, cold, untrustworthy, and filled with hate for humans. And regardless of terrible danger, Jack is determined to use the mirror to go back and learn what really happened to his father ...« less