lˈæski fˈɜːst kˈeɪm tə pɹˈɑːmɪnəns wɪð hɪz nˈaɪntiːnhˈʌndɹɪd fˈɪfti bˈʊk sˈiːdz ʌv tɹˈiːzən, kˈoʊˈɔːθɚd wɪð ɹˈælf də toʊldˈɑːnoʊ, ɪnwˌɪtʃ ðɪ ˈɔːθɚz ˈɑːɹɡjuːd ɐɡˈɛnst ˈældʒɚ hˈɪs ænd ɪn fˈeɪvɚɹ ʌv wˈɪɾeɪkɚ tʃˈeɪmbɚz, wɪð ɹᵻɡˈɑːɹd tə tʃˈeɪmbɚz ˌækjuːzˈeɪʃənz bˈoʊθ hiː ænd hˈɪs hɐdbɪn spˈaɪz fɚðə sˈoʊviət jˈuːniən.
Lasky first came to prominence with his 1950 book Seeds of Treason, co-authored with Ralph de Toledano, in which the authors argued against Alger Hiss and in favor of Whittaker Chambers, with regard to Chambers' accusations both he and Hiss had been spies for the Soviet Union.