The article discusses Czech- and German-language popular Christian literature published in Bohemia, Czech Republic, during the 18th and 19th centuries in order to chart the history of popular religious beliefs and practice by both Catholics and Protestants. The authors reflect on the value of such manuscripts and pamphlets as sources for religious history and describe the collections available in libraries in the Czech Republic. Topics discussed include the role of prayerbooks, for example by Capuchin monk Martin von Cochem, Bavarian government official Karl Eckart von Eckartshausen, and the anonymous book "Obět' před Bohem," for the development of personal Catholic religious identities, methods of copying the texts, and differences between Catholic and Protestant texts.