Here is a partial list of sources used in writing The Prosperous Peasant. You may also be interested in a brief overview of Hideyoshi's life.

Japanese
Ashigaru kara Chie Hitotsu de Kakeagatta Tennkajin: Toyotomi Hideyoshi, Owada Tetsuo, Shogakukan, 1996

Bushido, Nitobe Inazo, Kodansha 1998

Hideyoshi no Subete ga Wakaru Hon, Owada Tetsuo, Mikasa Shobo 1995

Hyakusho kara Mita Sengoku Daimyo, Kuroda Motoki, Chikuma Shinsho 2006

Komyo ga Tsuji, Shiba Rentaro, Bunshun Bunko 2005

Oda Nobunaga: Senran no Yo no Fuunji, Nagahara Keiji, Shueieisha 1988

Nihon no Rekishi: Ranka no Jidai kara Tenka Toitsu ni, Owada Tetsuo, Seibido Shuppan 2002

Nihon no Rekishi: Tenka Toitsu—Azuchi-Momoyama Jidai, Kasahara Kazuo, Shueieisha 1982

Sengoku Jidai, Mura to Machi no Katachi, Niki Hiroshi, Yamakawa Shuppansha 2004

Sengoku Jidai no Dai-Joshiki, Owada Tetsuo, Poplar 2006

Sengoku Jidai no Dogu Zukan, Yamamoto Kenji, PHP Research 2003

Shinpen Ehon Taikoki, Rekishi Ehon Kenkyukai, 1995

Toyotomi Hideyoshi: Sengoku no Nihon wo Hitotsu ni Matometa Hito, Ohki Yuji, Kaseisha 1957

Toyotomi Hideyoshi: Sengoku no Yo wo Toitsu shita Tenkajin, Nagahara Keiji, Shueieisha 1988

Zori-Tori kara Sengoku no Eiyu ni: Toyotomi Hideyoshi, Okada Akio, Kodansha 1981

English

101 Letters of Hideyoshi, translated and edited by Adriana Boscaro, Sophia University, 1975

A History of Japan: 1334-1615, George Sansom, Stanford University Press, 1961

A History of Japan During the Century of Early Foreign Intercourse (1542-1651, James Murdoch, The Chronicle, 1903

A History of the Japanese People From the Earliest Times to the End of the Meiji Era, Capt. F. Brinkley, The Encyclopedia Britannica Co., 1915

A World Elsewhere, Europe's Encounter with Japan in the Sixteenth and Seventeenth Centuries, Derek Massarella, Yale University Press, 1990

Bushido, Nitobe Inazo, The Leeds & Biddle Co. 1900

Daily Life in Japan at the Time of the Samurai, 1185-1603, Louis Frederic, Praeger, 1972

Everyday Life in Traditional Japan, Charles J. Dunn, Tuttle, 2001

Hideyoshi, Mary Elizabeth Berry, Harvard University Press, 1982

Japan in Days of Yore, Walter Dening, East-West Publications 1978

Japanese Warrior Monks AD 949-1603, Stephen Turnbull, Osprey Publishing 2003

Katsuno's Revenge and Other Tales of the Samurai, Miyamori Asataro, Dover, 2006

Musui’s Story: The Autobiography of a Tokugawa Samurai, Katsu Koichi (translated by Teruko Craig), The University of Arizona Press, 1988

Southern Barbarians: The First Europeans in Japan, Michael Cooper, Kodansha International, 1971

The Analects, Confucius (translated by Arthur Waley), Everyman's Library 1938

The Christian Century in Japan, C.R. Boxer, Cambridge University Press, 1974

The Japanese Mission to Europe, 1582-1590, Michael Cooper, Global Oriental, 2005

The Life of Toyotomi Hideyoshi, Walter Dening, J. L. Thompson and Co., 1904

The Samurai Banner of Furin Kazan, (translated by Yoko Riley), Tuttle Publishing, 2006

The Tao Te King, Lao Tzu, Frederick Ungar Publishing Co. 1958

They Came to Japan: An Anthology of European Reports on Japan, 1543-1640, Michael Cooper, Thames and Hudson, 1966

Things Japanese: Being Notes on Various Subjects Connected with Japan, Basil Chamberlain, Kelly & Walsh, Ltd., 1905

This Island of Japan: Joao Rodrigues' Account of 16th Century Japan, Michael Cooper, Hakluyt Society, 2001