Hartley Howard 1908-1979   Pseudonym of Leopold Horace Ognall. He also wrote under the pseudonym 'Harry Carmichael'.

Titles and year of publication:
 

1) The Last Appointment	1951
2) The Last Deception	1951
3) Death of Cecilia	1952
4) The Last Vanity	1952
5) Bowman Strikes Again	1953
6) The Other Side of the Door	1953
7) Bowman at a Venture	1954
8) Bowman on Broadway	1954
9) No Target for Bowman	1955
10) Sleep for the Wicked	1955
11) The Bowman Touch	1956
12) A Hearse for Cinderella	1956
13) Key to the Morgue	1957
14) The Long Night	1957
15) The Big Snatch	1958
16) Sleep, My Pretty One	1958
17) The Armitage Secret	1959
18) Deadline	1959
19) Extortion	1960
20) Fall Guy	1960
21) I'm No Hero	1961
22) Time Bomb	1961
23) Count-Down	1962
24) Double Finesse	1962
25) The Stretton Case	1963
26) Department K. (US Title: Assignment K.)	1964
27) Out of the Fire	1965
28) Counterfeit	1966
29) Portrait of a Beautiful Harlot	1966
30) Routine Investigation	1967
31) The Eye of the Hurricane	1968
32) The Secret of Simon Cornell	1969
33) City on My Shoulder	1970
34) Room 37	1970
35) Million Dollar Snapshot	1971
36) Murder One	1971
37) Epitaph for Joanna	1972
38) Nice Day for a Funeral	1972
39) Highway to Murder	1973
40) Dead Drunk	1974
41) Treble Cross	1975
42) Payoff	1976
43) One-Way Ticket	1978
44) The Sealed Envelope	1979
As 'Harry Carmichael'
1) Death Leaves a Diary	1952
2) The Vanishing Trick	1952
3) Deadly Night-Cap	1953
4) School for Murder	1953
5) Death Counts Three (US Title: The Screaming Rabbit)	1954
6) Why Kill Johnny?	1954
7) Money for Murder	1955
8) Noose for a Lady	1955
9) The Dead of Night	1956
10) Justice Enough	1956
11) Emergency Exit	1957
12) Put Out That Star (US Title: Into Thin Air)	1957
13) James Knowland: Deceased	1958
14) A Question of Time	1958
15) ...Or Be He Dead	1959
16) Stranglehold (US Title: Marked Man)	1959
17) Requiem for Charles (US Title: The Late Unlamented)	1960
18) The Seeds of Hate	1960
19) Alibi	1961
20) Confession	1961
21) The Link	1962
22) Of Unsound Mind	1962
23) Vendetta	1963
24) Flashback	1964
25) Safe Secret	1964
26) Post Mortem	1965
27) Suicide Clause	1966
28) The Condemned	1967
29) Murder by Proxy	1967
30) A Slightly Bitter Taste	1968
31) Death Trap	1970
32) Remote Control	1970
33) Most Deadly Hate	1971
34) The Quiet Woman	1971
35) Naked to the Grave	1972
36) Candles for the Dead	1973
37) Too Late for Tears	1973
38) The Motive	1974
39) False Evidence	1976
40) A Grave for Two	1977
41) Life Cycle	1978