A Shorter Summa - The Essential Philosophical Passages of St. Thomas Aquila’s Summa Theological Edited and ExplainedA shortened version of Kreeft's much larger Summa of the Summa, which in turn was a shortened version of the Summa Theologica. The reason for the double shortening is pretty obvious: the original runs some 4000 pages! (The Summa of the Summa was just over 500.) The Summa is certainly the greatest, most ambitious, most rational book of theology ever written. In it, there is also much philosophy, which is selected, excerpted, arranged, introduced, and