It would be a safe bet that there are more editions of the writings of and more biographies concerned with St. Thomas Aquinas than any other saint. This latest is a biography of his mind, and is written for the Aquinas scholar. A brief account of his family and his early years with the Benedictines at Monte Cassino and later as a student at the University of Paris precedes the main portion of the book, which starts when he joins the Dominican Order and begins his studies under Albert the Great. The book is well documented and is, frankly, one that only scholars and experts will fully understand and enjoy. There are explanations that clarify what Aquinas said and so lead to a broader understanding of the principles of Roman Catholic Church teaching. There are concrete examples of the constant change of face of the Church. St. Thomas' challenge to the position taken by St. Augustine is one, as he points out that Augustine was inadequate as a spiritual mentor in the 13th century. This fine study by Dr. Bourke will lead to a deeper appreciation of St. Thomas' teaching for today.