Adversary Cycle Series
(7 books)


Books in the series:
1.  
The Keep (1981)

2.  
The Tomb (1984)

3.  
The Touch (1986)

4.  
Reborn (1990)

5.  
Reprisal (1991)

6.  
Nightworld (1992)

7.  
Signalz (2020)