Once inseparable, identical twins El and Cat have been estranged for 12 years when El goes missing and Cat returns to their childhood home after two decades spent far away. As children, imagination ruled within this house, which the girls called Mirrorland. As each piece of the puzzle — El's disappearance, the memories Cat buried in the dark corners of her mind — falls into place, the desire to know what is fantasy versus reality, and what truths lie behind a wall of denial, becomes more urgent and terrifying. Johnstone has plenty of tricks up her sleeve in this suspenseful tale of betrayal and revenge, memory and imagination, and the thin line between love and hate. —