On August 17, 2020, the official twitter account of NISIOISIN has announced the latest installment of the Monogatari Series Light Novel, Ougimonogatari will be the title of the latest volume of the Monogatari Novel. Ougimonogatari will be the 4th book of the current season titled Monster Season. The new novel will be released on October 28, 2020, in Japan.
Check the official announcement here.
The Official Cover For Ougimonogatari
Ougimonogatari (扇物語) will be the 21st part of the Monogatari Series. It is the 26th book in the series over all, and will contain the stories, Ougi Light and Ougi Fright.