Tubes is a behind-the-scenes look at the real, tangible, physical heart of the internet, this elusive and seemingly invisible technology that permeates all of our lives on a daily basis.

In 2006, Senator Ted Stevens of Alaska was widely mocked for referring to the Internet as 'a series of tubes'.

But while many laughed at the Senator's description of the World Wide Web as hopelessly outdated, it turns out he was more right than wrong.

Andrew Blum is a journalist who has written for Vanity Fair, Wired, and the New York Times.

In this book, Blum takes a deep look at the physical infrastructure of the Internet, following our data as it travels around the world's servers and hubs - all connected by what could roughly be described as tubes.