Last year, I was given and read Nick Harkaway’s GNOMON, and I’ve wanted to take a little time to describe to you why you should read it, if you haven’t already.

GNOMON starts with an investigator in London looking into the death of someone in the course of what should have been a routine investigation. A woman was strapped into a chair and her mind was probed with drugs and machines to learn the truth of who she was and whether she posed a threat to the city. Mielikki Neith works for The Witness—an automated algorithmic learning and surveillance system tied into a systema dn series of networked devices across London’s populace, creating and enabling the ultimate democracy. Citizens are engaged and connected to the laws, status, and operations of their country, in real time, and it is through this system that Neith is assigned to the task of investigating Diana Hunter’s death.

From there, things get very strange, very fast. As the real-time recording of Hunter’s mind under interrogation unfolds in Neith’s consciousness—a tool used by Witness service to maximize transparency and understanding—Neith finds more than just Hunter’s mind: she also the life story of another. As the story unfolds, it actually doesn’t. It refolds, mountain folds, and valley folds through time and space and placeness, and that gets, ultimately, to what I want to say to you about what Nick Harkaway has done here.

Here are some things that are true about GNOMON:

This book is and is about magic, machine consciousness, and communities of resistance, in the weirdest ways possible.

It is exactly 666 pages long.

This book has four or five or six main threads, and it weaves all of them around and through all of them, each enveloping and enfolding each, wrapping around the outside only to then traverse it and find that you are inside of and beneath the next layer in the line.

The entire book resonates with Borges, Hofstadter, Danielewski, Butler, and LeGuin, without imitation.

Each one of these personages appears or seems to appear, but just when you think you’re sure how they’ll be seen, they are not there, like a shark fin in the ocean that becomes and always was the wave of the sea you’re swimming in and then, again, or maybe never, churns and is the shark: No less deeply and immediately important for the reminder of what is in there with you, and quietly unsettling for upending what you think you know…

GNOMON is the kind of thing that you know is behaving as intended when one of the metaphors/similes/analogies you’ve decided to use to describe it shows up in it the day after you think of it.

It is almost impossible to spoil this book without telling you literally all of the events of this book, but I also don’t want to colour your intake, too much, other than to say that this book is important. There is mystery in it, and there’s art. It is a masterful thing, and if all you see is the surface plot of it, then you’ve missed the central conceit of the thing.

If you have not already done so, definitely get it, when you get a chance.

Nick Harkaway’s GNOMON is available from Penguin Books.