Mission of Honor is to be the next installment to the Honor Harrington Series. As of right now Mission of Honor is only a working title.
Mission of Honor is the twelvth book of David Weber's series of novels and short stories chronicling the adventures of Honor Harrington. It has no exact release date until now, but Weber himself confirmed that "hopefully readers won't be left too long between books".
Timeframe: after 1921 PD
According to David Weber, The Shadow of Saganami and Storm from the Shadows both focus primarily on the events in and around the Talbott Cluster, while Crown of Slaves and the still unnamed Crown of Slaves II focus on the covert war between Torch and Mesa, as well as the moral issues of genetic slavery. Mission of Honor, the next book of the main series, will weave events from both of those areas together and advance the general storyline towards its final destination.