SANDY DENNY / MICK HOUGHTON I've Always Kept A Unicorn: The Biography Of... (2015 UK 502-page softback book by Michael Houghton which tells the story of Sandy Denny, one of the greatest British singers of her time and the first female Britishsinger-songwriter to produce a substantial and enduring body of original songs. Based on original and candid interviews with more than fifty of her friends, fellow musicians and contemporaries, and with access to previously unseen documents, photographs and Sandy's own notebooks. With foreword by Richard Thompson)