The redoubtable Father Robert Koesler is preparing to welcome into his parish Father Zachary Tully. An obstacle to Father Tully's assumption of his duties is suddenly put forth by the bishop, Vincent Delvecchio, a man Father Koesler has known since seminary days. An evening of talk leads Koesler and Tully into a discussion about the difficult bishop. As Father Koesler tries to explain the character of Delvecchio and his relationship to the many people in their common past, our holy sleuth uncovers a murder that had previously gone unnoticed. What will he do? In The Greatest Evil, author William X. Kienzle was in top form. His twentieth Father Koesler whodunit is packed with Kienzle's signature twists and turns, all featuring the venerable vicar who often becomes a wise and wary investigator. As Father Koesler begins solving the mystery behind Delvecchio's demanding nature, the priest puzzles over an extremely odd set of circumstances. Kienzle reveals sacred and sober secrets at just the right moment to achieve the author's intended effect. The combination makes for the kind of spellbinding story that mystery buffs came to expect from Kienzle.