- Killer InstinctRobert W. Walker
- Unnatural instinctRobert W. Walker
- Grave instinctRobert W. Walker
- City for RansomRobert W. Walker
- Absolute instinctRobert W. Walker
- Shadows in the White CityRobert W. Walker
- Bitter instinctRobert W. Walker
- Absolute instinctRobert W. Walker
- Blind instinctRobert W. Walker, Robert Wayne Walker
- City of the Absent (Inspector Alastair Ransom Mysteries)Robert W. Walker
- Fatal InstinctRobert W. Walker
- Brain watchRobert W. Walker
- Cold edgeRobert W. Walker
- Dead onRobert W. Walker
- Pure InstinctRobert W. Walker
- Darkest instinctRobert W. Walker
- Double edgeRobert W. Walker
- Extreme instinctRobert W. Walker
- Unnatural InstinctRobert W. Walker
- Blind instinctRobert W. Walker
