For Oberammergau itself, the literature is mostly about the Passion Play. James Shapiro's Oberammergau: The Troubling Story of the World's Most Famous Passion Play (2000) is the essential one — a Columbia scholar's investigation of how the village navigated the play's centuries-long association with antisemitism and rewrote the script for the modern era. It is sympathetic to the villagers without flinching from the hard questions.
For Bavarian context, Karl Stankiewitz's Hexen, Wallfahrten, Räuber: Bayerische Sagen offers folk tales from across the region; in English, Greg Steinmetz's The Richest Man Who Ever Lived on the Fugger banking dynasty captures the late-medieval Bavaria that shaped both Augsburg and the Alpine valleys. For something narrower, the village tourist office sells Otto Huber's Passion Play Oberammergau, the official illustrated companion produced for each ten-year cycle, with photographs of the productions back through the 20th century.