That is the new book by Ben Wilson, and no it has nothing (directly) to do with Brexit. Rather it is a survey of the technological breakthroughs of the 1850s and how they reshaped Great Britain and the globe more generally. Here is one short bit:
Japan may have secluded itself from the rest of the world, but it had not closed itself off. That was a distinction that people in the West were slow to grasp. The shogun’s court subscribed to the Illustrated London News, for example, and the bakufu had acquired books and papers detailing global politics and scientific discoveries through their Dutch and Chinese trading partners. This knowledge was strictly regulated, but the seeds of scientific enlightenment were diffused in small numbers across the archipelago. Perry did not know it — and nor did many Japanese — but his telegraph was not the first on Japanese soil.
Other parts of this book which I enjoyed were on the Great Geomagnetic Storm of 1859, how the British saw a connection between the U.S. Civil War, and the origins of Reuters.
If you want a new Brexit-relevant title of interest, try Brendan Simms, Britain’s Europe: A Thousand Years of Conflict and Cooperation.