The novel series’ “final season” ended with Zoku Owarimonogatari in September 2014, but it featured a teaser for “Monogatari Series, Next Season Tsugimonogatari.”
The novel series began with the two-volume Bakemonogatari story in 2006, and it served as the basis for the first anime adaptation of the novels in 2009.
The Owarimonogatari Second Season anime special, the most recent anime in the franchise, tackles the third Owarimonogatari novel volume.
NisiOisin’s Monogatari Series novels center on Koyomi Araragi, a loner and failing student.