1. Enterprise Stardust (1969) by Walter Ernsting and K H Scheer
2. The Radiant Dome (1969) by Walter Ernsting and K H Scheer
3. Galactic Alarm (1969) by Kurt Mahr and W W Shols
4. Invasion from Space (1970) by Walter Ernsting and Kurt Mahr
5. The Vega Sector (1970) by Walter Ernsting, Kurt Mahr and K H Scheer
6. The Secret of the Time Vault (1971) by Clark Darlton
7. Fortress of the Six Moons (1971) by K H Scheer
8. The Galactic Riddle (1971) by Clark Darlton
9. Quest Through Space and Time (1971) by Clark Darlton
10. The Ghosts of Gol (1971) by Kurt Mahr
11. The Planet of the Dying Sun (1972) by Kurt Mahr
12. Rebels of Tuglan (1972) by Clark Darlton
13. The Immortal Unknown (1972) by K H Scheer
14. Venus in Danger (1972) by Kurt Mahr
15. Escape to Venus (1972) by Clark Darlton
16. Secret Barrier X (1972) by W W Shols
17. The Venus Trap (1972) by Kurt Mahr
18. Menace of the Mutant Master (1972) by Kurt Mahr
19. Mutants Vs. Mutants (1972) by Clark Darlton
20. The Thrall of Hypno (1972) by Clark Darlton
21. The Cosmic Decoy (1973) by K H Scheer
22. The Fleet of the Springers (1973) by Kurt Mahr
23. Peril on Ice Planet (1973) by Kurt Mahr
24. Infinity Flight (1973) by Clark Darlton
25. Snowman in Flames (1973) by Clark Darlton
26. Cosmic Traitor (1973) by Kurt Brand
27. Planet of the Gods (1973) by Kurt Mahr
28. The Plague of Oblivion (1973) by Clark Darlton
29. A World Gone Mad (1973) by Clark Darlton
30. To Arkon! (1973) by Kurt Mahr
31. Realm of the Tri-Planets (1973) by K H Scheer
32. Challenge of the Unknown (1973) by Clark Darlton
33. The Giant's Partner (1973) by Clark Darlton
34. SOS: Spaceship Titan! (1973) by Kurt Brand
35. Beware the Microbots (1973) by Kurt Mahr
36. Man and Monster (1973) by K H Scheer
37. Epidemic Center: Aralon (1974) by Clark Darlton
38. Project: Earthsave (1974) by Kurt Brand
39. The Silence of Gom (1974) by Kurt Mahr
40. Red Eye of Betelgeuse (1974) by Clark Darlton
41. The Earth Dies (1974) by Clark Darlton
42. Time's Lonely One (1974) by K H Scheer
43. Life Hunt (1974) by Kurt Brand
44. The Pseudo One (1974) by Clark Darlton
45. Unknown Sector: Milky Way (1974) by Kurt Mahr
46. Again: Atlan! (1974) by K H Scheer
47. Shadow of the Mutant Master (1974) by Kurt Brand
48. The Dead Live (1974) by Clark Darlton
49. Solar Assassins (1974) by Kurt Mahr
50. Attack from the Unseen (1974) by Clark Darlton
51. Return from the Void (1974) by Kurt Mahr
52. Fortress Atlantis (1974) by K H Scheer
53. Spybot! (1974) by Clark Darlton
54. The Blue Dwarfs (1974) by Kurt Mahr
55. The Micro-Techs (1974) by Clark Darlton
56. Prisoner of Time (1974) by Clark Darlton
57. A Touch of Eternity (1974) by Clark Darlton
58. The Guardians (1974) by Kurt Mahr
59. Interlude on Siliko 5 (1974) by Kurt Brand
60. Dimension Search (1974) by Kurt Mahr
61. Death Waits in Semispace (1975) by Kurt Mahr
62. The Last Days of Atlantis (1975) by K H Scheer
63. The Tigris Leaps (1975) by Kurt Brand
64. Ambassadors from Aurigel (1975) by Kurt Mahr
65. Renegades of the Future (1975) by Kurt Mahr
66. The Horror (1975) by William Voltz
67. Crimson Universe (1975) by K H Scheer
68. Under the Stars of Druufon (1975) by Clark Darlton
69. Bonds of Eternity (1975) by Clark Darlton
70. Thora's Sacrifice (1975) by Kurt Brand
71. The Atom Hell of Grautier (1975) by Kurt Mahr
72. Caves Of The Druufs (1975) by Kurt Mahr
73. Spaceship of Ancestors (1975) by Clark Darlton
74. Checkmate: Universe (1975) by Kurt Mahr
75. Planet Topide, Please Reply! (1975) by Kurt Brand
76. Recruits for Arkon (1975) by Clark Darlton
77. Conflict Center: Naator (1975) by Clark Darlton
78. Power Key (1975) by K H Scheer
79. The Sleepers (1975) by William Voltz
80. The Columbus Affair (1975) by K H Scheer and William Voltz
81. Pucky's Greatest Hour (1975) by Kurt Brand
82. Atlan in Danger (1975) by Kurt Brand
83. Ernst Ellert Returns! (1975) by Clark Darlton
84. Secret Mission: Moluk (1975) by William Voltz
85. Enemy in the Dark (1975) by Kurt Mahr
86. Blazing Sun (1976) by Clark Darlton
87. The Starless Realm (1976) by Clark Darlton
88. The Mystery of the Anti (1976) by K H Scheer
89. Power's Price (1976) by Kurt Brand
90. Unleashed Powers (1976) by Kurt Brand
91. Friend to Mankind (1976) by William Voltz
92. The Target Star (1976) by K H Scheer
93. Vagabond of Space (1976) by Clark Darlton
94. Action: Division 3 (1976) by Kurt Mahr
95. The Plasma Monster (1976) by Kurt Mahr
96. Horn: Green (1976) by William Voltz
97. The Phantom Fleet (1976) by Clark Darlton
98. The Idol from Passa (1976) by Kurt Mahr
99. The Blue System (1976) by K H Scheer
100. Desert of Death's Domain (1976) by Kurt Mahr
101. Blockade: Lepso (1976) by Kurt Brand
102. Spoor of the Antis (1976) by William Voltz
103. False Front (1976) by Clark Darlton
104. The Man with Two Faces (1976) by Kurt Brand
105. Wonderflower of Utik (1976) by Kurt Mahr
106. Caller from Eternity (1976) by Kurt Brand
107. Emperior and the Monster (1977) by William Voltz
108. Duel Under the Double Sun (1977) by K H Scheer
109. The Stolen Spacefleet (1977) by Clark Darlton
110. Sgt. Robot (1977) by Kurt Mahr
111. Seeds of Ruin (1977) by William Voltz
112. Planet Mechanica (1977) by William Voltz
113. Heritage of the Lizard People (1977) by Clark Darlton
114. Death's Demand (1977) by Kurt Mahr
115. Saboteurs in A-1 (1977) by Kurt Brand and William Voltz
116. The Psycho Duel (1977) by Kurt Brand and William Voltz
117. Savior of the Empire (1977) by K H Scheer
118. The Shadows Attack (1977) by Clark Darlton
In the Center of the Galaxy (1978) by Clark Darlton
Agents of Destruction (1979) by Kurt Brand

1. Spider Desert (1977) by Ernst Vlcek
1. The Wasp Men Attack (1977) by Hans Kneifel and W W Shols
2. Flight from Tarkihl (1977) by Kurt Mahr
2. Menace of Atomigeddon (1977) by Kurt Mahr
3. Pale Country Pursuit (1977) by Hans Kneifel
3. Robot Threat: New York (1977) by W W Shols
4. The Crystal Prince (1977) by K H Scheer
5. War of the Ghosts (1977) by Clark Darlton