David Bowie swapped drug binges for biscuits in his later years. The ‘Space Oddity’ hitmaker – who died of cancer in January 2016 – and his guitarist Earl Slick downed espresso and tucked into biscotti to keep them going through the night when recording his 2013 album ‘The Next Day’, a drastic change from the wild partying and illegal substances that had powered them through in the 1970s. Writing in his new book ‘Guitar’, Earl revealed in an extract obtained by the Daily Mirror newspaper: “During those sessions for ‘The Next Day’, we were older, obviously, and there was no dope. None. By 2012 …