Mills focusses completely on the music, and also casts light on parts of Morrison's songbook that are usually skipped over in career-overviews and synopses.
He concentrates especially on a number of case studies of key albums, particularly on Veedon Fleece, Into the Music and Common One.
The book contains interviews with several artists including Ben Sidran, Kevin Rowland (of Dexys Midnight Runners), Folk singer Kate Rusby and Maria McKee.
Like Ben Sidran, Mills is a musician as well as a writer so the book offers insight from inside the music as well as in-depth scrutiny of records and shows.
The book covers Morrison's musical debt to America, his 'Irishness', his approach to live work, analyses of studio recordings from Them right through to the present day and a whole chapter devoted to a study of Morrison as a singer and a musician.