Killmaster
1. Run Spy Run (1964)
2. The China Doll (1964)
3. Checkmate in Rio (1964)
4. Safari for Spies (1964)
5. Fraulein Spy (1964)
6. Saigon (1964)
7. A Bullet for Fidel (1965)
8. The Thirteenth Spy (1965)
9. Eyes of the Tiger (1965)
10. Istanbul (1965)
11. Web of Spies (1966)
12. Spy Castle (1966)
13. The Terrible Ones (1966)
14. Dragon Flame (1966)
15. Hanoi (1966)
16. The Danger Key (1966)
17. Operation Starvation (1966)
18. The Mind Poisoners (1966)
19. The Weapon of Night (1967)
20. The Golden Serpent (1967)
21. Mission to Venice (1967)
22. Double Identity (1967)
23. The Devil's Cockpit (1967)
24. The Chinese Paymaster (1967)
25. Seven Against Greece (1967)
26. A Korean Tiger (1967)
27. Assignment Israel (1967)
28. The Red Guard (1967)
29. The Filthy Five (1967)
30. The Bright Blue Death (1967)
31. Macao (1968)
32. Operation Moon Rocket (1968)
33. The Judas Spy (1968)
34. Hood of Death (1968)
35. Amsterdam (1968)
36. Temple of Fear (1968)
37. Fourteen Seconds to Hell (1968)
38. The Defector (1969)
39. Carnival for Killing (1969)
40. Rhodesia (1969)
41. The Red Rays (1969)
42. Peking-Tulip Affair (1969)
43. The Amazon (1969)
44. Sea Trap (1969)
45. Berlin (1969)
46. The Human Time Bomb (1969)
47. The Cobra Kill (1969)
48. The Living Death (1969)
49. Operation Che Guevara (1969)
50. The Doomsday Formula (1970)
51. Operation Snake (1969)
52. The Casbah Killers (1969)
53. The Arab Plague (1970)
     aka Slavemaster
54. The Red Rebellion (1970)
55. The Executioners (1970)
56. Black Death (1970)
57. The Mind Killers (1970)
58. Time Clock of Death (1970)
59. Cambodia (1970)
60. The Death Strain (1971)
61. Jewel of Doom (1970)
62. Moscow (1970)
63. Ice Bomb Zero (1971)
64. Mark of Cosa Nostra (1971)
65. The Cairo Mafia (1972)
     aka Cairo
66. The Inca Death Squad (1972)
67. Assault on England (1972)
68. The Omega Terror (1972)
69. Code Name: Werewolf (1973)
70. Strike Force Terror (1973)
71. Target: Doomsday Island (1973)
72. Night of the Avenger (1973)
73. Butcher of Belgrade (1973)
74. Assassination Brigade (1973)
75. The Liquidator (1973)
76. The Devil's Dozen (1973)
77. The Code (1973)
78. Agent Counter-agent (1973)
79. Hour of the Wolf (1973)
80. Our Agent in Rome is Missing (1973)
81. The Kremlin File (1973)
82. Spanish Connection (1973)
83. Death's Head Conspiracy (1973)
84. The Peking Dossier (1973)
85. Ice-trap Terror (1974)
86. Assassin Code Name Vulture (1974)
87. Massacre in Milan (1974)
88. Vatican Vendetta (1974)
89. Sign of the Cobra (1974)
90. Man Who Sold Death (1974)
91. N3 Conspiracy (1974)
92. Beirut Incident (1974)
93. Death of the Falcon (1974)
94. The Aztec Avenger (1974)
95. The Jerusalem File (1975)
96. Counterfeit Agent (1975)
97. Six Bloody Summer Days (1975)
98. Dr. Death (1975)
99. Z Document (1975)
100. Kathmandu Contract (1975)
101. Ultimate Code (1975)
102. Assignment Intercept (1976)
103. The Green Wolf Connection (1976)
104. Death Message (1976)
105. The List (1976)
106. The Fanatics of Al Asad (1976)
107. The Snake Flag Conspiracy (1976)
108. The Turncoat (1976)
109. Sign of the Prayer Shawl (1976)
110. The Vulcan Disaster (1976)
111. A High Yeald in Death (1976)
112. The Nichovev Plot (1976)
113. Triple Cross (1976)
114. The Gallagher Plot (1976)
115. Plot for the Fourth Reich (1977)
116. Revenge of the Generals (1978)
117. Under the Wall (1978)
118. The Ebony Cross (1978)
119. Deadly Doubles (1978)
120. Race of Death (1978)
121. Trouble in Paradise (1978)
122. The Pamplona Affair (1978)
123. The Doomsday Spore (1978)
124. The Asian Mantrap (1979)
125. Thunderstrike in Syria (1979)
126. The Redolmo Affair (1979)
127. The Jamaican Exchange (1979)
128. Tropical Death Pact (1979)
129. The Pemex Chart (1979)
130. Hawaii (1979)
131. Satan Trap (1979)
132. Reich Four (1979)
133. The Nowhere Weapon (1979)
137. The Stolen Pay Train (1974)
138. Strike of the Hawk (1980)
139. The Suicide Seat (1980)
140. Turkish Bloodbath (1980)
141. Cauldron of Hell (1981)
142. The Coyote Connection (1981) (with Bill Crider and Jack Davis)
143. The Dubrovnik Massacre (1981)
144. The G Man (1981)
145. The Golden Bull (1981)
146. The Katmandu Contract (1981)
147. The Ouster Conspiracy (1981)
148. The Parisian Affair (1981)
149. Pleasure Island (1981)
150. Solar Menace (1981)
151. Strontium Code (1981)
152. Appointment in Haiphong (1982)
153. Chessmaster (1982)
154. The Christmas Kill (1982)
155. Damocles Threat (1982)
156. The Death Star Affair (1982)
157. Deathlight (1982)
158. Dominican Affair (1982)
159. Dr. DNA (1982)
160. Earth Shaker (1982)
161. The Greek Summit (1982)
162. The Hunter (1982)
163. Israeli Connection (1982)
164. The Last Samurai (1982)
165. The Last Samuri (1982)
166. The Mendoza Manuscript (1982)
167. Norwegian Typhoon (1982)
168. Operation : McMurdo Sound (1982)
169. The Puppet Master (1982)
170. Retreat for Death (1982)
171. Treason Game (1982)
172. Typhoon Ray (1982)
173. The Death Dealer (1983)
174. Hide and Go Die (1983)
175. The Kali Death Cult (1983)
176. Operation Vendetta (1983)
177. The Outback Ghosts (1983)
178. The Yukon Target (1983)
180. The Istanbul Decision (1983)
181. The Decoy Hit (1983)
182. Earthfire North (1983)
183. The Budapest Run (1983)
184. Caribbean Coup (1984)
185. The Algarve Affair (1984)
186. Zero-Hour Strike Force (1984)
187. Operation Sharkbite (1984)
188. Death Island (1984)
189. Night of the Warheads (1984)
190. Day of the Mahdi (1984) (with Gayle Lynds)
191. Assignment: Rio (1984)
192. Death Hand Play (1984)
193. The Kremlin Kill (1984)
194. The Mayan Connection (1984) (with Gayle Lynds)
195. San Juan Inferno (1984)
196. Circle of Scorpions (1985)
197. The Blue Ice Affair (1985)
Death Mission : Havana (1980)
The Tarantula Strike (1980)
198. The Macao Massacre (1985)
199. Pursuit of the Eagle (1985) (with Gayle Lynds)
200. The Vengeance Game (1985)
201. Last Flight to Moscow (1985)
202. The Normandy Code (1985)
203. White Death (1985) (with Gayle Lynds)
204. The Assassin Convention (1985)
205. Blood of the Scimitar (1985)
206. The Execution Exchange (1985) (with Gayle Lynds)
207. The Tarlov Cipher (1985)
208. Target Red Star (1985)
209. The Killing Ground (1985)
210. The Berlin Target (1986)
211. Mercenary Mountain (1986)
212. Blood Ultimatum (1986)
213. The Cyclops Conspiracy (1986)
214. Tunnel for Traitors (1986)
215. The Samurai Kill (1986)
216. Terror Times Two (1986)
217. Death Orbit (1986)
218. Slaughter Day (1986)
219. The Master Assassin (1986)
220. Operation Petrograd (1986)
221. Crossfire Red (1987)
222. Blood of the Falcon (1987)
223. Death Squad (1987)
224. The Terror Code (1987)
225. Holy War (1987)
226. Blood Raid (1987)
227. East of Hell (1987)
228. Killing Games (1987)
229. Terms of Vengeance (1987)
230. Pressure Point (1987)
231. Night of the Condor (1987)
232. The Poseidon Target (1987)
233. The Andropov File (1988)
234. Dragonfire (1988)
235. Bloodtrail to Mecca (1988)
236. Deathstrike (1988)
237. Lethal Prey (1988)
238. Spykiller (1988)
239. Bolivan Heat (1988)
240. The Rangoon Man (1988)
241. Code Name Cobra (1988)
242. Afghan Intercept (1988)
243. Countdown to Armageddon (1988)
244. Black Sea Bloodbath (1988)
245. The Deadly Diva (1989)
246. Invitation to Death (1989)
247. Day of the Assassin (1989)
248. The Korean Kill (1989)
249. Middle East Massacre (1989)
250. Sanction to Slaughter (1989)
251. Holiday in Hell (1989)
252. Law of the Lion (1989)
253. Hong Kong Hit (1989)
254. Deep Sea Death (1989)
255. Arms of Vengeance (1989)
256. Hell-Bound Express (1989)
257. Isle of Blood (1989)
258. Singapore Sling (1990)
259. Ruby Red Death (1990)
260. Arctic Abduction (1990)
261. Dragon Slay (1990)