Andrew Coddington 
Demons [PDF ebook] 

There are many creatures that inspire folklore. Some have existed for thousands of years, while others are more recent incarnations. Among the most enduring creatures of the past are demons. These creatures are as old as the Jewish faith, perhaps older, and hold a special place in the lives of humans. This book delves into the oldest demon folktales, explores the ways different cultures have experienced demons, and examines how demons are treated today.