To End in Fire – David Weber (David Weber, Eric Flint)
No guarantees, but this seems to be intended as the last Honor Harrington novel. (Or at least the end of the mainstream story. Certainly no guarantees about the franchise.) It wraps up as many plot threads as possible, as benignly as possible. It’s going to appeal to fans, and it’s going to appeal only to fans.
There isn’t much plot. The Solarians are reforming their government - a process that entails many committee meetings. The Mesans are reforming their government - a process that entails almost everyone behaving rationally. Various flavors of spooks are looking for the Alignment - and having surprisingly-little difficulty.
There isn’t much story-telling, either. Much of the page count consists of characters lecturing each other. Much of the remaining character interaction consists of banter - and almost all the banter sounds the same.
Mostly, it’s a chance for the readers and the writers to say goodbye.