What is the author's style in What's Bred in the Bone by Robertson Davies?

What's Bred in the Bone is written as a biography of Francis Cornish. It proceeds chronologically, starting with the familial and cultural background of Francis Cornish and concluding with his death. However, it is a biography with a twist. What the reader is reading is "the record, or the film, or the tape or whatever it must be called" of Francis's life on file with the Angel of Biography.