From the preface:
Schiller was not less efficiently qualified by nature for an historian than for a dramatist. He was formed to excel in all departments of literature, and the admirable lucidity of style and soundness and impartiality of judgment displayed in his historical writings will not easily by surpassed, and will always recommend them as popular expositions of the periods of which they treat.
Download The History Of The Thirty Years' War from Project Gutenberg
or find a hard copy