‘This exceptional piece of work demonstrates almost beyond question that elements of Sefer Hasidim’s perception of key aspects of the afterlife were influenced by an array of beliefs current in the larger society involving both theology and folklore... The theses proffered are persuasive, grounded in a command of rabbinic material and familiarity with both Christian doctrines and European folktales... This is an eye-opening work that will have a significant impact on medieval Jewish studies.David Berger, Yeshiva University