Daphne Wrayne and the Four Adjusters

1 The Shadow of the Four (1934)
2 The Grip of the Four (1934)
3 The Hand of the Four (1935)
4 The Way of the Four (1936)
5 The Mark Of The Four (1936)
6 The Four Strike Home (1937)
7 Surprise For The Four (1937)
8 The Four Make Holiday (1938)
9 The Four Get Going (1938)
10 Challenge To The Four (1939)
11 The Four At Bay (1939)
12 It Couldn't Be Murder (1940)
13 Find the Professor (1940)
14 How Was It Done? (1941)
15 Murder in the Pool (1941)
16 The Mystery of Gruden's Gap (1942)
17 The Green Circle (1942)
18 Murder As Arranged (1943)
19 Murder in the Air (1943)
20 Murder in Black (1944)
21 The Mystery of Joan Marryat (1946)
22 The Secret of the Grange (1946)
23 The Strange Affair At Greylands (1948)
24 Missing from His Home (1949)
25 Other Than Natural Causes (1949)
26 On the Night of the 14th (1950)
27 Who Killed Henry Wickenstrom (1951)
28 The Jaws of Darkness (1952)
29 The Black Spider (1953)
30 The Circle of Freedom (1953)
31 Murder Will Speak (1954)
32 The Strange Case of Pamela Wilson (1954)
33 Over Thin Ice (1955)
34 In The Dead Of Night (1955)
35 The Best-laid Schemes (1955)
36 The Mystery of the Corded Box (1956)
37 When Thieves Fall Out (1956)
38 Desperate Steps (1957)
39 When Danger Threaten's (1957)
40 Foul Deeds Will Rise (1958)
41 Not Long To Live (1959)
42 Third Time Unlucky (1959)
43 Wanted For Questioning (1960)
44 Once Too Often (1960)
45 Once Upon A Crime (1961)
46 Perilous Hazard (1961)