From the food we eat and the fuel we burn to the materials that make up our everyday objects – we live in a material world. The traders who get these commodities from producers to consumers are key players in the world economy, yet also some of the most secretive and least scrutinised. Javier Blas and Jack Farchy are two journalists who report on energy and natural resources for Bloomberg News. In The World for Sale, they rip the veil off this sector, exposing the often dubious and amoral ways in which some trading houses have amassed staggering fortunes. I expect that this eye-popping exposé, which sometimes reads more like a crime novel, will be warmly welcomed by both seasoned readers of business books and inquisitive passers-by.