This book is about an aspect of mediaeval Arabic culture and literature known in Arabic as mujun (roughly 'libertinism, licentiousness, frivolity, indecency, profligacy, shamelessness, impertinence', etc.), a concept that students of mediaeval Arabic texts may find rather hard to define but which is a recurrent term and a widespread phenomenon in mediaeval Arabic literature, and probably common in real life. The social implications and the background of mujun are focussed on in an attempt to learn what the popularity of mujun during a specific period of the mediaeval Middle East can tell us...