Ing taun 1937, Hill nerbitake buku sing paling laris Think and Grow Rich, sing dadi karya Hill sing paling misuwur. Bojone Hill sing anyar, Rosa Lee Beeland, nyumbang banget kanggo nulis lan nyunting Think and Grow Rich. Biografer Hill mengko bakal ujar manawa buku iki adol 20 yuta salinan sajrone 50 taun, sanajan Richard Lingeman ujar ing biografi ringkesane, "Alice Payne Hackett '70 Taun Best Sellers' nuduhake jumlah kasebut luwih sithik. "Wis sugih maneh, Hill miwiti gaya urip mewah lan tuku omah anyar ing Gunung Dora, Florida. Sawise sawetara taun, pasangan kasebut pegatan udakara taun 1940, kanthi akeh kekayaan saka buku kasebut menyang garwane Rosa Lee, ninggalake Napoleon Hill kanggo miwiti ngupayakake sukses maneh. Pitakon: Kapan buku kasebut, Think and Grow Rich kasedhiya kanggo masarakat?
1937 taun