The Pillow Book (枕草子, Makura no Sōshi) is a book of observations and musings recorded by Sei Shōnagon during her time as court lady to Empress Consort Teishi during the 990s and early 1000s in Heian-period Japan. The work is a collection of essays, anecdotes, poems, and descriptive passages which have little connection to one another except for the fact they are ideas and whims of Shōnagon's spurred by moments in her daily life. In it she included lists of all kinds, personal thoughts, interesting events in court, poetry, and some opinions on her contemporaries. While it is mostly a personal work, Shōnagon's writing and poetic skill makes it interesting as a work of literature, and it is valuable as a historical document. She wrote The Pillow Book as a private endeavor of enjoyment for herself