As might be expected, the literature of the time reflected the unsettled nature of the period. The "Hōjōki" describes the turmoil of the period in terms of the Buddhist concepts of impermanence and the vanity of human projects. The "Heike monogatari" narrated the rise and fall of the Taira, replete with tales of wars and samurai deeds. A second literary mainstream was the continuation of anthologies of poetry in the "Shin Kokin Wakashū", of which twenty volumes were produced between 1201 and 1205.