I like this series. I like most of the main characters. Charles? He's an ass. He annoyed me before, but in this installment, I hated him. I wouldn't be upset if he left on one of his secret missions and never returned. He can go find a like somewhere else and just be gone.
One major flaw with this series is how the underlying mystery wraps up. It just sort of ends. In this one, there was no real closure. No real motive or reason, even though I guessed who it was early on.
One thing that really does annoy me, the editing is really bad. I'm not sure whether it's typos or blatant grammatical errors, and I know that things are missed when it is put onto a Kindle format, but these mistakes are really beyond annoying.