Dr Kathryn Harkup is in a mission to unveil the hidden atomic world that surrounds us. Here she introduces 52 of the most vital, fatal, unusual and alarming molecules that are part of our daily lives. Molecules are constructed from a limited set of atoms that can combine in an almost infinite variety of arrangements. And when they do, they take on a kaleidoscope of properties and become far greater than the sum of their parts. From adrenaline to ozone and from nylon to DNA, Harkup explores the impact of a myriad of molecules and how they keep us engaged with life and living - or indeed the reverse. Harkup examines her cast of strange and intriguing compounds with forensic gusto and narrative flair; revealing the complexity and power of the hidden world that surrounds us.