I roto i te 1937, i whakaputaina e Hill te pukapuka tino pai-hoko Think and Grow Rich, i riro i te mahi tino rongonui o Hill. I whai wāhi nui te wahine hou a Hill, a Rosa Lee Beeland ki te tuhi me te whakatika o Think and Grow Rich. Ka kii nga kaituhi o Hill i muri mai ko tenei pukapuka i hokona e 20 miriona kape i roto i nga tau 50, ahakoa e kii ana a Richard Lingeman i roto i tana haurongo poto, "Alice Payne Hackett's '70 Years of Best Sellers' e kii ana he iti ake te nui".I muri i etahi tau, ka wehe te tokorua i te 1940, me te nuinga o te taonga o te pukapuka ka haere ki tana wahine a Rosa Lee, ka waiho a Napoleon Hill ki te tiimata i tana whai angitu.
Ko te tau 1937