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’ “Monster Season” launched with the Shinobumonogatari novel in July 2017.
The studio SHAFT returns to adapt the Off Season and Monster Season books in NisiOisin’s Monogatari series.
Four “Off Season” volumes — Orokamonogatari, Wazamonogatari, Nademonogatari, and Musubimonogatari — shipped in October 2015, January 2016, July 2016, and January 2017, respectively.