- Series: Solar Warden Series Record # 59491
- Series Tags: science fiction (3)
- Solar Warden
- 1 Alien Secrets (2020) by William H. Keith, Jr. [only as by Ian Douglas]
- 2 Alien Hostiles (2021) by William H. Keith, Jr. [only as by Ian Douglas]
- 3 Alien Agendas (2023) by William H. Keith, Jr. [only as by Ian Douglas]