Sinan Danacioglu I was looking for a book that would let me understand 30 Years War and it's background. This book delivers was so much info that I feel enriched with each chapter. It is a bit long read but totally worth it. Definitely one of the best books I have read.
Glenn Andersen The Pusuit of Glory is magnificent and highly recommendable, but I don't believe it matters which book you begin with.