I'm joined today by one of British music journalism's most famous voices, David Hepworth, to discuss his new book 'Overpaid, Oversexed and Over There - How a Few Skinny Brits With Bad Teeth Rocked America'. David has been writing about music since the 1970's, and was involved in the launches of Smash Hits, Q and The Word Magazine. He is also one half of the Word in Your Ear podcast. His book looks at the British Invasion of 1964 - how did this happen? What made America embrace The Beatles so fully? How did the cultural conversation between the two nations change of the past 50 years?