The Dark Enquiry is the last (up to this point) full-length novel in the Julie Grey series. It's been a few months since the events in Dark Road to Darjeeling and the Brisbanes are setting back into London life. Julia is still trying to get Brisbane to accept her more fully as a partner in his private enquiry service and Brisbane is trying his hardest to keep that from happening. He should know better by now that Julia will not be pacified to sit at home while her husband is out solving mysteries. What Brisbane fails to recognize is Julia's need to help her husband doesn't just come out of her being bored, it comes out of her need to feel as though she's helping / protecting Brisbane in his sometimes dangerous exploits. What Julia, on her end, is that Brisbane worries for her safety as well. Brisbane has told her this countless times, but it hasn't yet sunk in. 
 So clearly married life still holds some compromises for Julia and Brisbane and we see them starting to figure them out more and more. When Julia, again, unwittingly involves herself in Brisbane's enquiry into a Medium, he actually caves in a lets Julia in on this investigation especially since it has ties to her oldest brother Belmont. 
 I will say that I liked The Dark Enquiry more than Dark Road to Darjeeling. It was nice being back in London and that we are more accessible to more Marches. Julie's father makes a wonderfully funny appearance and I realised how much this series revolves around the whole family and not just Julia and Brisbane. 
 We learn more about Brisbane himself. His business by trade is finding out secrets so it's little wonder that he has some of his own that he hasn't even shared with Julia. I like that even after five books and various novellas Deanna Raybourn can still keep her characters fresh and insteresting.