Contents: Chapter I - Into the Primitive, Chapter II - The Law of Club and Fang, Chapter III - The Dominant Primordial Beast, Chapter IV - Who Has Won to Mastership, Chapter V - The Toil of Trace and Trail, Chapter VI - For the Love of a Man, Chapter VII - The Sounding of the Call.
Contents: Chapter I - Into the Primitive, Chapter II - The Law of Club and Fang, Chapter III - The Dominant Primordial Beast, Chapter IV - Who Has Won to Mastership, Chapter V - The Toil of Trace and Trail, Chapter VI - For the Love of a Man, Chapter VII - The Sounding of the Call.