In his book "Ideals of the Samurai" translator William Scott Wilson states: "The warriors in the Heike Monogatari served as models for the educated warriors of later generations, and the ideals depicted by them were not assumed to be beyond reach. Rather, these ideals were vigorously pursued in the upper echelons of warrior society and recommended as the proper form of the Japanese man of arms. With the Heike Monogatari, the image of the Japanese warrior in literature came to its full maturity." Wilson then translates the writings of several warriors who mention the Heike Monogatari as an example for their men to follow.

Who wrote 'Ideals of the Samurai'?