Dr. Hasker wrote a book

Dr. William Hasker, emeritus professor of philosophy, has written a new book titled, "Metaphysics and the Tri-Personal God." His book contains an analysis of the doctrine surrounding the Trinity from a philosophical and theological standpoint. He describes it in his introduction as a "three-in-oneness problem," asking the questions, "Is this something we can understand? Is it something we can express without contradiction? Is it really possible that the doctrine is true?"