9.
The Crossroads of Time (1956)
1
5.0
16.
Secret of the Lost Race (1959)
1
3.0
18.
Storm over Warlock (1960)
1
4.0
23.
The Defiant Agents (1962)
3
3.667
28.
Judgement on Janus (1963)
2
4.0
29.
Web of the Witch World (1964)
3
4.667
31.
Ordeal in Otherwhere (1964)
1
4.0
33.
Year of the Unicorn (1965)
1
5.0
35.
Three Against the Witch World (1965)
2
5.0
37.
Moon of Three Rings (1966)
2
4.5
39.
Operation Time Search (1967)
1
5.0
41.
Warlock of the Witch World (1967)
1
5.0
45.
Sorceress of the Witch World (1968)
1
5.0
46.
Postmarked the Stars (1969)
5
4.2
50.
Exiles of the Stars (1971)
1
5.0
52.
The Crystal Gryphon (1972)
1
5.0
91.
The Gate of the Cat (1987)
2
3.5
92.
Dare to Go A-Hunting (1989)
1
2.0
101.
Brother to Shadows (1993)
3
4.667
109.
The Key of the Keplian (1995)
1
5.0
113.
The Warding of Witch World (1996)
1
5.0
115.
Derelict for Trade (1997)
2
3.5
119.
The Shadow of Albion (1999)
1
5.0