I received an advanced reader copy of this book in exchange for an honest review. My honest recommendation is thus: Buy it if you're interested in fantasy (especially "fantasy of manners"), mysteries, stories with deep and complex worldbuilding and magic systems, or any combination of these. I adore this book.
"The Deathsniffer's Assistant" by Kate McIntyre is a fantastic mystery set in an Edwardian realm where magic is dying. Years after the crash of the Floating Castle killed hundreds in a case of spiritbinding gone wrong, Christopher Buckley is forced by his dwindling family fortune to take on menial work as an assistant to investigative Deathsniffer Olivia Faraday. But while working on a case surrounding the death of Duke Viktor val Daren, Chris and Olivia stumble onto a conspiracy that goes deeper than anyone could have imagined. Two factions, the traditionalists and the reformists, fight constantly over whose outlook is best for the future of Tarland, and their schemes may have been tied up in the Floating Castle incident. Not to mention the way both factions seek to take Christopher's talented younger sister, Rosemary, under their wing and use her to their own ends.
It's odd to me that fantasy themed mysteries are so uncommon. I've always enjoyed a good mystery, and surely in a fantasy world it would be even easier to create a case where you can make a new set of rules stick properly. A lot of fantasy books have mystery elements, pieces that go unexplained until the inevitable plot twist, but there's very few out-and-out detective stories, and this one does it beautifully.
The true lead of the story is not Chris, but Olivia Faraday, who brings light and life to the pages in a way I'm not sure any other character could. Olivia is larger than life in a way that understandably puts off other characters in the book -- they can't understand and sometimes can't tolerate her behavior or her frenzied energy, but the book is all the better for it. Olivia needs her story told, and yet it's completely understandable that she can't be the one to tell it. Chris himself is a likeable enough character, if occasionally a judgmental ponce, and he's an acceptable everyman to be a window into the madness that is Olivia's life and business.
One of the most important things to me about this book is the sheer number of strong and individual female characters that make up it cast. You have Olivia, of course, the titular Deathsniffer -- manic and eccentric, as at-once confusing and brilliant as Sherlock Holmes. Olivia's supervisor is a tough, stubborn woman named Maris who is a stickler for procedure and has a lot of practice with Olivia's wilder attitudes. Christpher hires a governess, Rachel Albany, who is a stern woman with a magical ability to sense and respond to emotions from other people. Christopher's first case, the death of Viktor val Daren, is brought to Olivia by Viktor's wife, Evelyn, a noblewoman greatly concerned with maintaining her reputation and appearance, as well as the safety of her fragile and sweet daughter, Analaea. And, of course, there's Christopher's sister, Rosemary -- headstrong and willful, wanting to use her natural magical gifts to help society without realizing how she might be taken advantage of. Every female character is different from the one introduced prior to her.
There's other characters, of course. Christopher's family friend and financial advisor, Fernand. The sleazy loan shark Rayner Kolston. Doctor Livingstone, leader of the reformist movement calling for change in Tarlish society's view of spiritbinding. And the young, proud William, a man who can see the past of an object just by touching it. Every character is important, either to the mystery itself or to the greater story in the backdrop, involving Christopher's fortunes as well as the truth about the Floating Castle Incident. There's no extraneous or unnecessary voices.
I also greatly enjoy the magic system in this book. I'm often skeptical of "spreadsheet fantasy," where it seems like all magic can be mapped out according to specific categories without any overlap. I've enjoyed Brandon Sanderson's Mistborn books, for example, but often found that the magic system was too straightforward. While this magic system has some of those elements, there's also a lot of underlying complications. The process of categorization which determines what gifts a person has is starting to fail, and more people are emerging from it without any skills that the test can find. It's implied that the boxes which Tarland society puts its magicians into aren't natural constraints of the system, but ones that they have found convenient -- and ones which might not even be accurate. On top of that, the most valued members of the magical elite, the spiritbinders, are becoming fewer and fewer, and ones that do exist, like Rosemary, get burned through quickly by a society desperate to maintain the status quo. In addition, the way that the magic of Tarlish society has influenced its technology and development is always apparent, and it never feels like the two developed separately from one another.
The mystery is well put together and shines in retrospect, but I think the most interesting part of the book is the greater conspiracy that surrounds the story and will almost definitely be dealt with further in future books. What really happened to the Floating Castle? Was it just a natural failing of spiritbinding or was there sabotage? Why? And who would have done such a thing? Why is categorization failing, and what does it mean for the future of Tarland? There's a really firm foundation for future books here. Kate McIntyre has indicated on her Goodreads page, as well as on her personal blog, that there are three more Deathsniffer books in the works and that the second one has just been finished and is currently undergoing revisions. I'll be eagerly waiting for the second book -- and in line to buy the first.
I'm going to be recommending this book to a lot of people I know and probably giving it to a few of them as a surprise gift.