Brother Cadfael's Penance: The Twentieth Chronicle of Brother Cadfael

In Brother Cadfael's 20th chronicle, Peters deftly binds the medieval monk's new adventure with family ties, moving from issues intensely public to problems determinedly private. Olivier de Bretagne, who (unknown to himself) is Brother Cadfael's son, has been taken prisoner during England's dynastic war between two grandchildren of William the Conqueror. Cadfael is determined to find Olivier, although to do so he must leave the monastery without his abbot's ``leave or... blessing.'' The search begins badly when, at an unsuccessful peace conference, Yves Hugonin, Olivier's hot-headed brother-in-law, picks a fight with Brien de Soulis, a commander who may know where Olivier is held-but won't say. When Brien is found murdered, Yves is abducted by one who holds him responsible for the killing, and then Cadfael has two men to find. In the process, he delicately explores puzzles related to Brien's death and to shadowy deeds in the larger political scene. While Cadfael does his usual excellent sleuthing, Peters succeeds at an equally subtle game, demonstrating how personal devotion can turn to enmity-and how such enmity can be forestalled by justice and mercy. Mystery Guild selection. (Dec.)