Fred Mills’ debut book transforms construction from a background industry into one of the most compelling stories of the 21st century.

Most of us pass through cities without ever pausing to consider the extraordinary complexity beneath them. The roads we drive on, the tunnels we pass through, the trains we board and the energy systems that power our lives are often treated as invisible infrastructure—essential, yet overlooked.

In Mega Builds: Ten Colossal Construction Projects That Will Change Our World, filmmaker and construction journalist Fred Mills argues that these engineering marvels are, in fact, the defining story of our time.

Mills’ debut book has struck a chord with readers, rapidly becoming a Sunday Times bestseller and emerging as one of the UK’s most talked-about non-fiction releases of 2026.

Best known as the founder and face of The B1M, the world’s largest construction-focused media platform, Mills draws on more than a decade of unparalleled access to some of the planet’s most ambitious building sites. The result is a book that is as much about human ambition as it is about engineering.

Rather than presenting a dry catalogue of statistics and technical specifications, Mega Builds unfolds like a global expedition. Mills takes readers from Saudi Arabia’s controversial desert megacity, to Japan’s levitating high-speed trains, and into France’s race to unlock nuclear fusion energy, revealing how these massive undertakings are quietly reshaping the future of civilisation.

At its heart, the book asks a series of urgent questions: Are nations now competing through infrastructure rather than ideology? Can engineering solve challenges that politics struggles to address? And who ultimately gets to decide what the cities of tomorrow will look like?

One of the book’s greatest strengths lies in its ability to make complex engineering concepts accessible without diluting their significance. Mills blends first-hand reporting, behind-the-scenes access and clear explanations to create a narrative that is both informative and deeply engaging.

The book also succeeds in shifting the public perception of construction itself. Mills makes a persuasive case that infrastructure is far more than an industry; it is the physical expression of human progress. Every bridge, tunnel, rail network and energy system represents a decision about how future generations will live.

Yet Mega Builds does not romanticise progress uncritically. Alongside the awe-inspiring scale of these projects, Mills acknowledges their controversies, environmental implications and social consequences. This balance gives the book a welcome sense of nuance.

Written in a cinematic, conversational style, the book carries the same energy that has made The B1M a global phenomenon. There is plenty of data and technical insight, but the storytelling remains approachable and often infused with humour.

The central message is strikingly simple: humanity’s future is not being written solely in government offices or corporate boardrooms—it is being built, every day, in steel, concrete and human ingenuity.

The enthusiastic reception has reflected that broader appeal. London Mayor Sadiq Khan described it as “a fascinating exploration of the world’s biggest and boldest construction projects”, while author Christian Wolmar called it “a superb counterpoint to the usual media negativity around big projects that are the product of human ambition”.

In an age dominated by conversations about artificial intelligence, climate change and geopolitical competition, Mega Builds offers a refreshing reminder that some of the most important transformations are happening in plain sight.

This is not merely a book about buildings. It is a book about the future—and about the extraordinary lengths humanity is willing to go to shape it.

Ambitious, accessible and surprisingly exhilarating, Mega Builds turns the hidden world of infrastructure into an engrossing story about the future of civilisation itself.