baɪ nˈaɪntiːnhˈʌndɹɪd sˈɪksti wˈʌn, wˌɛn də lˌæ ɹˈɑːtʃ dˈaɪd, ðə sˈɪɹiz hæd sˈoʊld mˈoːɹ ðɐn ᵻlˈɛvən mˈɪliən kˈɑːpɪz ɪn wˈʌnhˈʌndɹɪd nˈaɪnti θɹˈiː ˈɪŋɡlɪʃ ænd nˈaɪnti tˈuː fˈɔːɹən ᵻdˈɪʃənz.
By 1961, when de la Roche died, the series had sold more than eleven million copies in 193 English and 92 foreign editions.