Web Beneath the Waves

Samanth Subramanian writes for the New Yorker, The New York Times Magazine, and The Guardian, among other publications. His last book, A Dominant Character: The Radical Science and Restless Life of J. B. S. Haldane, was one of The New York Times’ Top 100 Books of 2020. His previous book, This Divided Island: Stories from the Sri Lankan War, was shortlisted for the Samuel Johnson Prize and the Royal Society of Literature’s Ondaatje Prize. He lives in London.

An Economist Best Book of 2025“Mr. Subramanian is an elegant and witty writer.... He makes of his subject a fascinating travelogue.” —Wall Street Journal“This brief, lyrical survey of the internet’s underwater infrastructure and the people who maintain it offers a timely reminder of the extent to which the modern world depends on a fragile filigree of subsea cables—and of the many ways in which the supposedly disembodied online world is vulnerable to physical, commercial and geopolitical interference. —The Economist“The Web Beneath the Waves is an elegant study of a hidden world.” —Los Angeles Review of Books“A fascinating journey...Subramanian’s profiles of the people who build, repair, and maintain these deep-sea arteries offer a glimpse into an unseen and essential global community. A gripping look at the hidden infrastructure that binds the modern world—and the chaos that follows when it snaps.” —Kirkus Reviews“Even while dwelling on the history and political intrigue surrounding the undersea cables, Subramanian deftly weaves in the tedious, physical work that goes into planning routes, laying the cables, and repairing them. He carefully traces the weeks of slow, deliberate maneuvering it takes to move a cable from a large ship to a smaller boat, where—guided by a diver—it is then taken to the shore and hooked up to a data center. Throughout the book, Subramanian shares the accounts of people who do this work, reminding readers of the very human nature of the invisible internet.” —Science Magazine“A fascinating dive into the world of the 1.4 million kilometres of undersea cables quietly supporting the internet. From understanding how they are built to how they can be fixed—and everything in between—The Web Beneath the Waves packs a punch. As a slim book, not a single word is wasted, making for an unforgettable read that will make you think differently about the internet and how exactly it works.” —Geographical“The Web Beneath the Waves is a fascinating offering, structured basically as a travelogue that brings history, science, Big Tech, and geopolitics together to paint a picture of a precarious present pointing at a fragile future.” —Open“The Web Beneath the Waves ultimately succeeds because it makes readers see the internet not as a cloud or abstraction, but as a physical system with a history, a geography and real points of failure.... Subramanian’s book leaves us with an unsettling but necessary insight: the more connected our world becomes, the more it depends on fragile lines laid silently beneath the waves.” —The Irish Times