 Unlike previous books in the series, the majority of "Hyakki Tsurezure Bukuro"'s yōkai appear to be of Sekien's own creation, based on turns of phrase or stories from "Tsurezuregusa" and other works of literature.Also unlike the other books in the series, "Hyakki Tsurezure Bukuro" has a rudimentary narrative framework, described as the record of a strange dream in early printings (the third printing omits this introduction).The book is compiled in three sub-volumes