Mirage tells the story of Julie Gordon, a research scientist who, by means of virtual reality, has made great inroads into mapping human memory. Julie is forced by circumstances to delve into the memory of her twin sister Samantha, who is in a coma as a result of a mysterious bomb blast. Julie's trek into her sister's mind brings her closer to understanding both her estranged sister and the truth about a tragic event from their childhood. Messrs. Wilson and Costello deliver a solid piece of work, which will please fans of both authors.