Bruce Springsteen called him 'one of the great, great American songwriters', Jackson Browne hailed him as 'the first and foremost proponent of song noir', and Stephen King once said that if he could write like him, he 'would be a happy guy'. The list of artists that lined up to appear on his records include Bruce Springsteen, Neil Young, Bob Dylan, Dave Gilmour and Emmylou Harris. So how is it that most people, if they have heard of Warren Zevon at...