In Cole's author's note, he states that his inspiration for the book was to explain away the discrepancy.
ɪn kˈoʊlz ˈɔːθɚz nˈoʊt, hiː stˈeɪts ðæt hɪz ˌɪnspɚɹˈeɪʃən fɚðə bˈʊk wʌz tʊ ɛksplˈeɪn ɐwˈeɪ ðə dɪskɹˈɛpənsi.