FORMAT/INFO: A Drop of Corruption was published by Del Rey on April 1st, 2025. It is 465 pages long and available in hardcover, ebook, and audiobook formats.

OVERVIEW/ANALYSIS: Investigators Ana and Dinios are used to unusual crimes, so investigating the disappearance of a Treasury officer from a locked room is a relatively trivial matter. It's only a matter of hours before Ana not only works out how the person disappeared, but also deduces that they have been murdered as well. But as to who did it and why? That's a much trickier mystery to solve. The culprit seems to possess an almost supernatural ability to circumvent security measures and to anticipate Ana's investigation. The only thing Ana knows for sure is that the murderer's ultimate target is the Shroud, a high-security factory where the Empire harvests the leviathan blood that drives so much of it. And if the Shroud falls, the Empire could fall with it.

A Drop of Corruption is another rousing success from Robert Jackson Bennett, at once both a twisty mystery and harsh critique of colonialism. Returning fans will settle right back in with Ana and Din's familiar cadence: Din does the leg-work, interviewing witnesses and assessing crime scenes, while Ana takes the information and works out how the pieces come together. I was glad to see how Din had grown into his role, understanding that Ana's sometimes odd requests always have a reason, and knowing what kinds of information Ana is looking for.

Even though Ana and Din are working on behalf of the Empire, this is not a book that takes the side of the Empire. Instead, it uses the mystery to examine the messy can of worms that comes from colonizing an already inhabited land. While many of those Din interviews are high level officials, there is attention paid to the common folk who get caught in the middle of the political games between the Empire and the native regional government. The story also acknowledges that there are no clean solutions to the problem, as the Empire pulling out of the colony comes with its own set of headaches and injustices.

This book never feels like a lecture, however, because the message is blended with the absolutely engrossing world-building. A Drop of Corruption continues to iterate on the weird alchemical enhancements introduced in the first book, introducing us to new weird ways people alter themselves in this world. And in the process of delving deeper into the science of alchemy...well let's say some past things that may have registered as off to some readers may start to make sense.

CONCLUSION: In short, A Drop of Corruption further solidifies Robert Jackson Bennett as an autobuy author for me. From his deep, intricate world-building to his real world commentary, every one of his books is a full meal. Even if you're just here for the mystery, you're going to have a great time. But for those who just want to lose themselves in a completely different world? You need to pick his books up.