Hermann Mannheim 
Comparative Criminology [PDF ebook] 
A Textbook

This is Volume I of fifteen in a series on the Sociology of Law and Criminology. Originally published in 1965, this textbook is part one of two, meant for students and deals more fully than usual with such fundamental matters as the very concepts of crime and criminology and especially with the highly complex relationship between crime, the criminal law and certain burning moral issues of our time. It also includes several chapters on the methodsof research used in criminological and penological investigations.