Stephen J. Lee 
The Thirty Years War [PDF ebook] 

The period 1618-1648 was one of the most complex in European history. Religion interacted with rebellion and dynastic rivalry in a series of conflicts in central Europe known collectively as the Thirty Years War. This book guides the reader through the period by surveying the narrative of events and establishing the essential chronological framework. In addition Stephen Lee looks at such key issues as the motives of the participants, their gains and losses, as well as at the religious, military, social and economic aspects of the War. Each section in the book incorporates the most recent research.