Norman Clark 
Introduction to Kant’s Philosophy [PDF ebook] 

Emmanuel Kant has the distinction of having introduced a great revolution into philosophy and yet stood the test of time. He stands as one of the great foundation stones of modern thought. This book, first published in 1925, covers Kant’s works essential to his philosophy as a system, and also illustrates his position in the history of thought. It is a clear and accurate statement of Kant’s chief doctrines.