Jonathon Green is a writer and broadcaster and the nation's expert on slang. His Dictionary of Slang first appeared in 1998 to huge critical acclaim, and Green's Dictionary of Slang, his definitive three-volume work, was published in autumn 2010. He has written widely on slang and dictionary-making, notably Slang Down the Ages and Chasing the Sun, a history of lexicography. He has also chronicled the world of the 1960s in two oral histories: Days in the Life and All Dressed Up. He lives in London and Paris.