"Jewish Devilry" is a book about evil spirits in the Jewish tradition and in popular perception. The attitude towards this side of the world is another mirror in which one can better see and understand the character of a nation. Jewish devils are no match for any foreign demons, large and small demons. They have a larger family tree, a higher purpose, and more original behavior. Evil spirits are mysterious and unpredictable for ordinary human understanding, but they fit perfectly into the picture of the world pre-established by the Creator and know their place in it. She can harm people, and maybe even help them - if you listen to the sages and know how to behave with her. The author of the book talks about all this with enthusiasm and infectiousness, combining erudition with humor, the Talmudic culture of discussion with the folk culture of laughter, piety with salty anecdote.