- UK
- Collins, London, Sep. 1934
- US
- Dodd, Mead, New York, 1935 as "The Boomerang Clue"
- Redbook Magazine, Nov. 1933 as 'The Boomerang Clue'
Plot

While playing an erratic round of golf, Bobby Jones slices his ball over the edge od a cliff. His ball is lost, but on the rocks below he finds the crumpled body of a dying man. With his final breath the man opens his eyes and says: 'Why didn't they ask Evans?'
Haunted by these words, Bobby and his vivacious companion, Frankie, set out to solve a mystery that will bring them into mortal danger.
Contents
1. The Accident
2. Concerning Fathers
3. A Railway Journey
4. The Inquest
5. Mr and Mrs Cayman
6. End of a Picnic
7. An Escape from Death
8. Riddle of a Photograph
9. Concerning Mr Bassington-ffrench
10. Preparations for an Accident
11. THe Accident Happens
12. In the Enemy's Camp
13. Alan Carstairs
14. Dr Nicholson
15. A Discovery
16. Bobby Becomes a Solicitor
17. Mrs Rivington Talks
18. The Girl of the Photograph
19. A Council of Three
20. Council of Two
21. Roger Answers a Question
22. Another Victim
23. Moira Disappears
24. On the Track of the Caymans
25. Mr Spragge Talks
26. Nocturnal Adventure
27. 'My Brother was Murdered'
28. At the Eleventh Hour
29. Badger's Story
30. Escape
31. Frankie Asks a Question
32. Evans
33. Sensation in the Orient Café
34. Letter from America
35. News from the Vicarage
Characters
Robert "Bobby" Jones, Lady Frances (Frankie) Derwent, Dr. George Arbuthnot, Henry Bassington-ffrench, Roger Bassington-ffrench, Sylvia Bassington-ffrench, Tommy Bassington-ffrench, Badger Beadon, Alan Carstairs, Amelia Cayman, Leo Cayman, Reverend Thomas Jones, Lord Marchington, Dr. Nicholson, Moira Nicholson, Gladys Roberts, Frederick Spragge, Inspector Williams
Films & TV
- Why Didn't They Ask Evans?, UK, 1980
- TV drama list
- Why Didn't They Ask Evans?, ITV/UK, 2011
- Agatha Christie's MARPLE Season 4
- Pourquoi pas Martin?, FR, 2013
- Les petits meurtres d'Agatha Christie Saison 2
UK/US covers
Collins / HarperCollins
- Collins, 1950 9th
- Collins, 1958
- Collins, 1938
- White Circle
- Fontana, 1956
- Fontana, 1959
- Fontana, 1966 5th; ca: Tom Adams*
- Fontana, 1972; ISBN:9780006130765; ca: Tom Adams*
- Fontana(#4208), 1976; ca: Tom Adams*
- Crime Club, 1979
- Fontana, 1985 5th
- Fontana, 1990; ISBN:9780006166061
- HarperCollins, 1996
- HarperCollins, 1998; Hardcover; ISBN:9780006166061
- HarperCollins, 2002
- HarperCollins, 2008; Masterpiece edition; ISBN:9780007122608
- HarperCollins, 2010; Facsimile edition/Hardcover; ISBN:9780007354603
- William Morrow Paperbacks, 2012; ISBN:9780062074126
- Collins, 2012; ELT Reader; ISBN:9780007451593
- Center Point, 2013; Library Binding/Hardcover; ISBN:9781611737110
- HarperCollins, 2017; ISBN:9780008196288
- HarperFiction, 2018; ISBN:9780008255954
- Newbury House Publishers, 2019; ISBN:9780062879813
- HarperCollins, 2022; TV tie-in edition; ISBN:9780008521356
Dodd, Mead / Grosset & Dunlap / Putnam
- Dodd, Mead, 1935; ♦Katsurou Hayashi
- Grosset & Dunlap, early edition; ♦William Homer
- Dodd, Mead, 1968; Greenway edition
- Dodd, Mead, 1987; Winterbrook edition/Hardcover; ISBN:9780396091554
- Putnam, 1990
Dell
- DELL(#46), 1944; ca: Gerald Gregg
- DELL(#46), 1944: mapback
- DELL(#664), 1953; ca: Fernando Texidor
- DELL(#664), 1953: mapback
- DELL(D340), 1960; ♦Sheldon Goldberg
♣William Teason
- DELL, 1966
- DELL(#0704), 1971; ♦Sheldon Goldberg
- DELL, 1975; ca: William Teason
- DELL, 1978; ca: William Teason; ISBN:9780440107040
- DELL, 1979; ca: William Teason; ISBN:9780440107040
- DELL, 1981
Pan
- PAN, 1968; ISBN:9780330107365
- PAN, 1971
- PAN, 1978
- PAN, 1980; ISBN:9780330107365; ♦Lauralee(ManorBooks)
Berkley
- Berkley, 1986; ISBN:9780425098554
- Berkley; ISBN:9780425098554
- Berkley, 1992; ISBN:9789994590056
- Berkley, 1997; ISBN:9780425098554
Other Publishers
- St.Martin's Press, 2002; ISBN:9780312981594
- Bestseller Mystery
- Ulverscroft Large Print, 1974; ISBN:9780854562701
- Albatross, 1934
- Planet Three Publishing
- G.K.Hall; ♦Ralf M.M. Stultiëns
Magazine
- Redbook Magazine, November, 1933
Audio

- Macmillan Audio Books, 2002; ISBN:9780333989074

- Macmillan Digital Audio, 2001; ISBN:9780230749207

- HarperCollins, 2003; ISBN:9780007191031



- AudioGo, 2005; ISBN:9781572704558

- Audio Partners, 2005; ISBN:9781572704541


- HarperCollins, 2006; ISBN:9780007211203

- HarperAudio, 2012


Western Europe covers
Pourquoi pas Evans?
Le Masque (#241) 1937
- Le Masque, 1937
- Le Masque, 1949
- Le Masque, 1959
- Le Masque, 1980
- Le Masque, 1983
- Le Masque, 1993; ISBN:9782702412015
- Masque Christie, 2006 fac similé; ISBN:9782702432754
- Le Masque; ISBN:9782702424285
- Masque Christie, 2014; ISBN:9782702441442
Club des Masques (#9) 1966
- Club des Masques 1966; ca: Tom Adams*
- Club des Masques, 1982; ISBN:9782702413500
- Club des Masques, 1999; ISBN:9782702413500
Le Livre de Poche (#5671) 1982
- Le Livre de Poche, 1982; ISBN:9782253030102
- Le Livre de Poche, 2003; ISBN:9782253030102
- Le Livre de Poche; ISBN:9782253030102
- Le Livre de Poche; ISBN:9782253030102
Other Publishers
- Hachette: Collection Agatha Christie (29), 2004; ISBN:9782846343978
- Edito-Service S.A., 1962
Waarom Evans niet?
- Sijthoff, 1964
- Sijthoff, 1969
- Sijthoff, 1974; ♦Eric Gellaerts
- Sijthoff, 1974; ♦Paula Dekkers
- Sijthoff, 1974
- Sijthoff, 1983
- Sijthoff, 1984
- Luitingh-Sijthoff/Poema, 1991; ISBN:9789024516179
- HLN, 2015
- Overamstel Uitgevers, 2015; ISBN:9789048823093
Ein Schritt ins Leere
- Scherz, 1992
- Scherz, 1994; ISBN:9783502512868
- Scherz, 1994
- Scherz, 1996
- Scherz, 2002; ISBN:9783502518488
- Goldmann, 1951
- Goldmann, 1955
- Goldmann, 1960
- Goldmann, 1968
- Goldmann
- Goldmann, 1979; ISBN:9783442000708
- Goldmann, 1983; ISBN:9783442000708
- Goldmann, 1985; ISBN:9783442000708
- Goldmann, 1997; ISBN:9783442439492
- Fischer, 2005; ISBN:9783596168903
- Hachette, 2009
- Atlantik, 2021; ISBN:9783455011852

Ein Schritt ins Leere
Audio


- Der Hörverlag, 2019

- Der Hörverlag, 2006
Northern Europe covers
Varför bad de inte Evans?
- Bonniers, 1943
- Delfinserien, 1966; ca: Tom Adams*
- Delfinserien, 1977; ca: Tom Adams*
- Bonniers, 1984
- Bonniers, 1990
- Bonniers, 1995
Audio

Varför bad de inte Evans?
Saga Egmont, 2020; ISBN:9788711788592
Hændeligt uheld? / Hvorfor spurgte de ikke Evans?
- Carit Andersen, 1965
- Forum Krimi, 1973
- Forum Krimi, 1984
- Peter Asschenfeldts nye Forlag, 1999
- Rosenkilde, 2017
- Lindhardt og Ringhof (e-bog), 2021; ISBN:9788711746844
Hvorfor spurte de ikke Evans?
- Aschehoug, 1948
- Aschehoug, 1969; ca: Erik Artell
- Aschehoug, 1979
- Aschehoug, 1981
- Aschehoug, 1988
- Aschehoug, 1996
Askel tyhjyyteen
- WSOY: SAPO(3), 1953/1956
- *OMNIBUS*
WSOY, 1977; ISBN:9789510080740; ca: Tom Adams*
- WSOY, 1981; ISBN:9789510102978
- WSOY: SAPO(3), 1990; ISBN:9789510155172
- WSOY, 2010; ISBN:9789510366011
Audio

Askel tyhjyyteen
WSOY, 2010; ISBN:9789510366370
Hver er Evans?
Miks nad ei kutsunud Evansit?
- Oktoober, 1991
Kodėl nepaprašė Evans?
- Poli, 1996
- Sirokas, 2008; ISBN:9789955740070
Southern Europe covers
Perché non l'hanno chiesto a Evans? / Ritratto di Ignota
- I Classici del Giallo(#328), 1979
- Mondadori, 1989
- I Classici del Giallo(#646), 1991; ca: Carlo Jacono
- Mondadori: Oscar scrittori moderni, 1995; ISBN:9788804397250
- Mondadori: Oscar scrittori moderni, 2003; ISBN:9788804520887
- Hachette Fascicoli, 2005
- Mondadori, 2010; ebook; ISBN:9788852014796
- Mondadori, 2014
- Mondadori: Oscar gialli, 2019; ISBN:9788804709145
Trayectoria de Boomerang / Trayectoria de Bumerán
Trayectoria de Boomerang
- Biblioteca Oro(#232), 1948
- Biblioteca Oro(#152), 1958
- Biblioteca Oro(#152), 1965; ca: Tom Adams*
- Biblioteca Oro(#152), 1975; ISBN:9788427201521
- Molino, 1996; ISBN:9788427285194
- Planeta
- Planeta, 2017
- La Nacion
Trayectoria de Bumerán
- Molino, 2004; ISBN:9788427298507
Cursa de bumerang / La cursa del bumerang
- La Llar del Llibre(#5), 1986; ISBN:9788472792272
- La Llar del Llibre(#5)
- Columna, 1996; ISBN:9788483001608
Por que Não Pediram a Evans? / Perguntem a Evans
Por que não Pediram a Evans?
- Nova Fronteira, 1976
- Círculo do Livro, 1983
- Nova Fronteira, 1986
- Record, 1987
- Record, 2000
- L&PM, 2006; ISBN:9788525415714; ♦Vicente Nogueira
- L&PM Pocket, 2015; ISBN:9788525431899
- HarperCollins Brasil, 2021; ISBN:9788595085930
Perguntem a Evans
- Colecção Vampiro(#328), 1974
Porque não Pediram a Evans?
- ASA(#36), 2008; ISBN:9789892304557
Οκτώ κόκκοι μορφίνης / Γιατί δεν ρώτησαν τον Έβανς; / Γιατί δε φώναξαν την Έβανς; / Εβανς... γιατι δεν ηταν εκει? / Η Κυρία Έβανς
Οκτώ κόκκοι μορφίνης
- Λυχνάρι, 1970
- Λυχνάρι
- Λυχνάρι; ISBN:9789605170257
- Λυχνάρι(A030), 1997; ISBN:9789605170257
- Λυχνάρι, 2008
- Λυχνάρι(M064)
Γιατί δεν ρώτησαν τον Έβανς;
- Καλοκάθη, 1993
- Καλοκάθη, 1997
- Καλοκάθης, 1993
- Ελληνική Εκδοτική
Γιατί δε φώναξαν την Έβανς;
- Ψυχογιός, 2019; ISBN:9786180131826
Εβανς... γιατι δεν ηταν εκει?
- Ερμειας
- ΓΑΛΑΞΙΑΣ, 1970
Η Κυρία Έβανς
- Λιβάνης, 1990; ISBN:9780002360227
Zasto nisu pitali Evansa?
- Mladinska knjiga (Beograd), 2009; ISBN:9788679281432; ♦Svetlana Andjelic
- Mladinska knjiga (Beograd), 2016
Zašto nisu pitali Evansa
- Nova knjiga, 2020
Zašto nisu pitali Evansa?
- Globus (Zagreb), 1980; ♦Svetlana Andjelic
- V.D.T. (Zagreb), 2009; ♦Svetlana Andjelic
- Mladinska knjiga (Zagreb), 2011; ISBN:9789531408646
Zakaj ne Evans?
- Državna založba Slovenije (Ljubljana), 1979
- Globus (Zagreb, Ljubljana), 1981
- Mladinska knjiga (Ljubljana), 2012
Eastern Europe covers
Proč nepožádali Evanse?
- Knižní klub, 2005; ISBN:9788024202679
- Knižní klub, 2010; ISBN:9788024227894
Miért nem szóltak Evansnak? / Miért nem hívták Evanst?
- Palladis Rt., 1937; ♦Sugar Viktoria
- Magyar Könyvklub, 1998; ♦Czibóka Tamas
- Aquila Könyvkiadó, 2006
- Aquila Könyvkiadó, 2007; ♦Horváth Tamás
- Európa Könyvkiadó, 2012; ISBN:9789630794879
- Helikon Kiadó, 2019; ISBN:9789634792376
Защо не повикаха Евънс?
- Абагар, 1993
- Ера(#68), 2016; ISBN:9789543893904
- Ера, 2021
Dlaczego nie Evans?
- Prószyński i S-ka: Biblioteczka Konesera, 1994; ISBN:9788373375635
- Wydawnictwo Dolnośląskie, 2001
- Hachette Polska: Kolekcja Hachette: Agatha Christie, 2003; ISBN:9788371847332
- Prószyński i S-ka: Biblioteczka Konesera, 2003; ISBN:9788372558275
- Wydawnictwo Dolnośląskie: Agata Christie - Królowa Kryminału, 2011; ISBN:9788324588497
- Wydawnictwo Dolnośląskie: Klasyka Kryminału, 2013; ISBN:9788324592838
- Wydawnictwo Dolnośląskie: Agatha Christie Kolekcja Kryminałów(48), 2016; ISBN:9788327154699
De ce nu l-au intrebat pe Evans? / De ce nu i-au cerut lui Evans?
- Excelsior-Multi Press, 1995
Чому не Еванс?
- Клуб Семейного Досуга, 2021; ISBN:9786171283480
Почему не Эванс? // Ответ знает Эванс / Почему не позвали Уилби?
Почему не позвали Уилби?
Почему не Эванс?
- Эксмо, 2009; ISBN:9785699346219
- Эксмо, 2010
- Эксмо, 2012; Детективный клуб Агаты Кристи; ISBN:9785699613151
- Эксмо, 2015; Агата Кристи. Серебряная коллекция; ISBN:9785699812738
- Hachette, 2018
- Эксмо, 2021; Агата Кристи. Любимая коллекция; ISBN:9785041222055
Why Didn't They Ask Evans?
- АСТ, 2004
- Менеджер, 2005
- Менеджер, 2005
Middle East & Asian covers
Neden Evans'a Sormadılar? / Evans Nerede / Ceset Dedi Ki / Esrarlı Kayalık / Evans'a Neden Sormadılar / Uçurumdan Aşağı
- Evans Nerede, Türkiye, 1963
- Uçurumdan Aşağı, Ak Kitabevi, 1963
- Ceset Dedi Ki !.., Altın Kitaplar, 1977
- Evans'a Neden Sormadılar, Ak Kitabevi, 1978
- Esrarlı Kayalık, Şilliler Yayınevi, 1981; ca: Tom Adams*
- Ceset Dedi Ki ..., Altın Kitaplar, 1988
- Neden Evans'a Sormadılar?, Altın Kitaplar, 2011; ISBN:9789752113411
- Neden Evans'a Sormadılar, Altın Kitaplar, ; ISBN:9789752113411
כדור בשדה הגולף / למה לא ביקשו את אוואנס
- Tel Aviv : M. Mizraḥi, 1980
- Tel-Aviv : Deshe, 1960
لماذا لم يسألوا إيفانز؟ / لغز الصورة
لماذا لم يسألوا إيفانز؟
- JARIR Reader, 2009; ISBN:6281072061579
- AJYAL Publishers
لغز الصورة
- دار الحرية للصحافة والطباعة والنشر
- الدار العربية للكتاب
چرا از ایوانز نخواستند؟ / چرا از اوانس نپرسیدند
چرا از ایوانز نخواستند؟
- Hermes books, A.P.1393; ISBN:9789643636456
- Hermes books, A.P.1389; ISBN:9789643636456
چرا از اوانس نپرسیدند
- A.P.1395
- ترانه
A.P.1389; ISBN:9789645638601
මාරයකුගේ පාපොච්චාරණය
- Fast Publishers, ; ISBN:9789556774276
Pembunuh di Balik Kabut / Langkah-langkah Maut
- Gramedia; ca: Tom Adams*
- Gramedia, 1998; ISBN:9789794035887; ca: Tom Adams*
- Gramedia
- Gramedia, 2018; ISBN:9789792286496
- Mekar Jaya, 1980
- ca: Tom Adams*
ฆาตกรย้อนรอย / พยาบาทฆาตกรรม
ฆาตกรย้อนรอย
- 1980(2523); ♦Rattanachai Lueangwongngam
- น้องใหม่, 1995(2538); ♦Rattanachai Lueangwongngam
- สร้างสรรค์บุ๊คส์, 2006(2549); ISBN:9789743414343; ♦Ratakorn
พยาบาทฆาตกรรม
- กาญจนา
Tại Sao Không Là Evans? / Người trong ảnh
Tại Sao Không Là Evans?
Người trong ảnh
悬崖上的谋杀 / 為什麼不找伊文斯?
悬崖上的谋杀
- 贵州人民出版社(阿加莎·克里斯蒂作品全集), 1998; ISBN:9787221047083
- 人民文学出版社(阿加莎·克里斯蒂侦探推理系列), 2010; ISBN:9787020081806
- 商务印书馆(阿加莎·克里斯蒂经典侦探作品集), 2018; ISBN:9787100159210
- 商务印书馆(阿加莎·克里斯蒂经典侦探作品集), 2019; ISBN:9787100173896
- 新星出版社(阿加莎·克里斯蒂作品77), 2019; ISBN:9787513335478
為什麼不找伊文斯?
- 遠流出版(克莉絲蒂推理全集), 2004; ISBN:9789573251620
なぜ、エヴァンズに頼まなかったのか? / 謎のエヴァンズ / 謎のエヴァンズ殺人事件
なぜ、エヴァンズに頼まなかったのか?
- 早川書房, 1959, 1976(2nd); ハヤカワ・ポケット・ミステリ(526)
- 早川書房, 1981; ハヤカワ・ミステリ文庫(HM1-62); ISBN:9784150700621; ca: Hiroshi Manabe
- 早川書房, 2004; クリスティー文庫(78); ISBN:9784151300783
謎のエヴァンズ
- 創元推理文庫, 1960, 1984(41st)
- 創元推理文庫, 1960; ISBN:9784488105181
謎のエヴァンズ殺人事件
- 新潮文庫, 1989
- 旺文社/中学時代一年生付録, 1960
- 小学館/中二文庫, 1962
- 高文社(Mystery Digest Series), 1963
- 金の星社, 1965
- 学研/中学生傑作文庫, 1967
- 偕成社, 1969
- 学研/Teens Fresh Books, 1973
- 金の星社, 1980
- 偕成社文庫, 2004; ISBN:9784036524907
왜 에번스를 부르지 않았지? / 부머랭 살인사건 / 왜 에반스에게 부탁 안했지 / 왜 이밴스에게 부탁 안했지 / 수수께끼의 에반스
왜 에번스를 부르지 않았지?
- 황금가지(애거서 크리스티 전집 22), 2007; ISBN:9788982737220
- 황금가지(애거서 크리스티 전집 완전판), 2016; ISBN:9788982737220
부머랭 살인사건
- 해문출판사, 1987; ISBN:9788938202277
- 해문출판사: 애거서 크리스티 미스터리(27), 1999
왜 에반스에게 부탁 안했지
- 일신서적출판사(IL.SIN MYSTERY COLLECTION 8), 1988; ISBN:9788936604080
왜 이밴스에게 부탁 안했지
- 자유시대사, 1986
- 자유문학사(추리문학 19), 1993; ISBN:9788942400607
수수께끼의 에반스
- 해문출판사(팬더 추리걸작시리즈 26), 1991