What the back of the book says
What I thought
Sir Tristan Hiregaard is a nobleman in the dark land of Nova Vaasa, to all outward appearances a kind lord who would never harm anyone.  Yet, Sir Tristan has a sinister secret, one that even he does not understand.....
At times the nobleman transforms into a brutish creature named Malken, a man-beast who finds no act too base, just as long as it extends the killing grip of his vast criminal empire.  No one is safe from Malkan, and it seems that no one can break his stranglehold on Nova Vaasa-until Tristan himself takes on a quest to destroy his evil side.
Well, if you're into the old Dr. Jekyll and Mr. Hyde formula, this book is for you.  A Dr. Jekyll and Mr. Hyde story set in a different time and a different place, and with two different main characters.  Also Tristan's double personality results from magic rather than science.  This book is above average, but certainly not outstanding.  There are many other books out there more exciting than this one that I would read before this one.