In The Literary Encyclopedia entry for Rand written in 2001, John David Lewis declared that "Rand wrote the most intellectually challenging fiction of her generation."
ɪnðə lˈɪɾɚɹˌɛɹi ɛnsˌaɪkloʊpˈiːdiə ˈɛntɹi fɔːɹ ɹˈænd ɹˈɪʔn̩ ɪn tˈuː θˈaʊzənd wˈʌn, dʒˈɑːn dˈeɪvɪd lˈuːɪs dᵻklˈɛɹd ðˈæt "ɹˈænd ɹˈoʊt ðə mˈoʊst ˌɪntəlˈɛktʃuːəli tʃˈæləndʒˌɪŋ fˈɪkʃən ʌv hɜː dʒˌɛnɚɹˈeɪʃən."