How To Make The World Add Up

Reading this in the US or Canada? Then you want the North American edition, The Data Detective.


Sunday Times bestseller





Fabulously readable, lucid, witty and authoritative... Every policiian and journalist should be made to read this book - Stephen Fry





Powerful, persuasive, and in these truth-defying times, indispensable - Caroline Criado Perez, author of Invisible Women





Nobody makes the statistics of everyday life more fascinating and enjoyable than Tim Harford - Bill Bryson





An immensely enjoyable guide to using statistics wisely - I loved it. Matt Parker, author of Humble Pi





He's a genius at telling stories that illuminate our world - Malcolm Gladwell





Wise and useful - such a delight. The Financial Times





I’m excited to announce that on 17 September, my new book was published in the UK and around the world by Bridge Street Press. How To Make The World Add Up is my effort to help you think clearly about the numbers that swirl all around us. 

 Tim Harford is our most likeable champion of reason and rigour… clear, clever and always highly readable.”

The Times, Books of the Year





Over the past 13 years of presenting More or Less I’ve come to realise that this clear thinking is only rarely a matter of technical expertise. Instead, it requires an effort to overcome our biases, set aside our preconceptions, and see beyond our emotional reactions. We need to be open-minded without being gullible, maintaining a healthy scepticism without lapsing into corrosive cynicism. Above all, we need to keep being curious.

 A Financial Times Book of the Year





I loved writing the book, trying to understand the heroes and villains of statistics, from Florence Nightingale to John Maynard Keynes. There are some strange cameos from an art forger, an erotic dancer, several alchemists and a whole phalanx of storks. I hope you’ll like it too.





Characteristic lucidity, concealed intellectual depths, wry humour – and a big unifying idea – from one of our finest economic and statistical communicators.”

The Independent

Tim Harford… has never been more needed. With a chatty style and a stream of good yarns, he offers a solid guide to sifting truth from statistical chaff.”

The Sunday Times, Books of the Year 

Rather than simply rebuffing statistical trickery, Harford’s book implores us to look past the bluster – and our own biases…required reading” 

Wired, best science and tech books of 2020

For anyone who wants to better understand the world around us, Tim Harford’s rollicking tales of statistical success and failure are tough to beat.”

Canberra Times



Harford is a gifted science communicator, a wonderful and sprightly writer. He’s spent many years teaching millions of people to consume statistics critically – but with this book, he’s doing something nobler: he’s teaching us to consume statistics WISELY.”

Cory Doctorow 


Harford is right to say that statistics can be used to illuminate the world with clarity and precision. They can help remedy our human fallibilities.”

Hannah Fry in The New Yorker



[One of] Ten books from 2020 you must not miss… fascinating.”



An entertainment for numerate readers and a user-friendly introduction to statistics for beginners.”

Kirkus Reviews

An engaging guide to avoid being bamboozled by statistics.”

Indo-Asian News Service


A must for anyone who is curious about how to make sense of all the information about this complex world in which we live.”

Louis Marc Ducharme, Chief Statistician of the International Monetary Fund


In his excellent book, How to Make The World Add Up, economist Tim Harford delineates 10 lessons to help us better understand new statistics or data.”

The Daily Telegraph











This wise book, distilled from years of experience, gives us the ten commandements, from first examing our feelings, to finally having the humility to admit we may be wrong. Priceless. - Professor Sir David Spiegelhalter





Wise, humane, and above all, illuminating. Nobody is better on statistics and numbers - and how to make sense of them. - Matthew Syed





Harford gives us a brilliant guide which teaches us how to be sceptical without being cynical, and to see that statistics are not scary, but a rare treasure that help us understand our society - Professor Hetan Shah, Chief executive of the British Academy





“An economist who literally wrote the book on communicating clearly with numbers boils down advice that will help you make better business and personal decisions.”




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