Sadly, the author died while writing this book. It is unfinished, and the author died on the eve of, the man he was writing about,Giordano Bruno's,execution for heresy (in january 1600). Morris bases his book on documentation from Giordono's past and from his trial as a heretic by the catholic church. You can see, and feel the resonance Morris felt for Giordano's unwelcome, open-minded logic, and get a vivid picture of life in that time.
Morris probably wouldnt, in my opinion, have wanted unfinished work published, as his work was always exquisitely polished (which, for obvious reasons this is not). However, I'm very grateful that it was.