Nisio Isin
Since the release of the "Bakemonogatari Anime Complete Guidebook" on October 28, 2010, Nisio Isin has been writing more than 60 short stories related to the anime or manga adaptation. The stories happens throughout all the timeline of the story featuring different narrators. They usually are brief stories talking about a specific topic, commentaries on literature, etc. Only the short stories in "Mazemonogatari" were collected in a book.