Title: The Metaconcert Series: Intervention Number in Series: 2 (two) Author: Julian May Cover Artist: Michael Herring Language: English Original Publisher: Del Rey Originally Published: February 1989 Publisher: Del Rey Published: August 1992 ISBN-10: 0345355245 ISBN-13: 9780345355249
Title: The Surveillance Series: Intervention Number in Series: 1 (one) Author: Julian May Cover Artist: Michael Herring Language: English Original Publisher: Del Rey Originally Published: December 1988 Publisher: Del Rey Published: December 1988 ISBN-10: 0345355237 ISBN-13: 9780345355232