| Series | | Books |
| Jerry Ahern |
| |
| Nick Carter (1964) | | (1980) |
| |
| Dan Track | | (1984) |
| | | (1984) |
| | | (1984) |
| | | (1984) |
| | | (1985) |
| | | (1985) |
| | | (1985) |
| | | (1985) |
| | | (1985) |
| | | (1985) |
| |
| Other | | Total War [The Survivalist] (1981) |
| | | The Nightmare Begins [The Survivalist] (1981) |
| | | The Quest [The Survivalist] (1981) |
| | | The Doomsayer [The Survivalist] (1981) |
| | | The Confederate (1983) |
| | | The Web [The Survivalist] (1983) |
| | | The Savage Horde [The Survivalist] (1983) |
| | | Earth Fire [The Survivalist] (1984) |
| | | The End Is Coming [The Survivalist] (1984) |
| | | The Prophet [The Survivalist] (1984) |
| | | The Awakening [The Survivalist] (1984) |
| | | The Takers [Takers] (1984)) |
| | | The Reprisal [The Survivalist] (1985) |
| | | The Rebellion [The Survivalist] (1985) |
| | | River of Gold [Takers] (1985) |
| | | Pursuit [The Survivalist] (1986) |
| | | The Terror [The Survivalist] (1986) |
| | | The Freeman (1986) |
| | | Miamigrad (1987) |
| | | Overlord [The Survivalist] (1987) |
| | | The Arsenal [The Survivalist] (1987) |
| | | The Battle Begins [Defender] (1988) |
| | | Yakusa Tattoo (1988) |
| | | The Ordeal [The Survivalist] (1988) |
| | | Surgical Strike [Surgical Strike] (1988) |
| | | Assault on the Empress [Surgical Strike] (1988) |
| | | The Killing Wedge [Defender] (1988) |
| | | Mid-Wake [The Survivalist] (1988) |
| | | Out of Control [Defender] (1988) |
| | | Decision Time [Defender] (1988) |
| | | Firestorm [The Survivalist] (1989) |
| | | Final Rain [The Survivalist] (1989) |
| | | Deathgrip [Defender] (1989) |
| | | The Struggle [The Survivalist] (1989) |
| | | Justice Denied [Defender] (1989) |
| | | Vengeance [Defender] (1989) |
| | | Escape [Defender] (1989) |
| | | Entrapment [Defender] (1989) |
| | | Brandywine (1989) |
| | | To End All War [The Survivalist] (1990) |
| | | The Legend [The Survivalist] (1990) |
| | | WerewolveSS (1990) |
| | | The Kamikaze Legacy (1990) |
| | | Infiltrator [Surgical Strike] (1990) |
| | | No Survivors [Defender] (1990) |
| | | The Challenge [Defender] (1990) |
| | | The Good Fight [Defender] (1990) |
| | | Brutal Conquest [The Survivalist] (1991) |
| | | Call To Battle [The Survivalist] (1992) |
| | | Blood Assassins [The Survivalist] (1992) |
| | | War Mountain [The Survivalist] (1993) |
| | | Countdown [The Survivalist] (1993) |
| | | Death Watch [The Survivalist] (1993) |
| | | The Golden Shield of the IBF (1999) |
| | | Summon the Demon [Takers] (2001)) |
| | | The Illegal Man (2003) |
| | | Written in Time (2010) |
| |
| Axel Kilgore |
| |
| They Call Me The Mercenary | | (1980) |
| | | (1980) |
| | | (1980) |
| | | (1981) |
| | | (1981) |
| | | (1981) |
| | | (1981) |
| | | (1982) |
| | | (1982) |
| | | (1982) |
| | | (1982) |
| | | (1982) |
| | | (1983) |
| | | (1983) |
| | | (1983) |
| | | (1983) |
| | | (1984) |
| |
| |