R. M. Wenley 
Kant and his Philosophical Revolution [PDF ebook] 

"The book is designed" writes the author in his preface, "to do the general reader a service and, of course, his demands concern the larger sweep of Kant’s thought rather than the minute details of the Critical Philosophy." And Wenley’s style certainly corroborates this statement. His way of getting from the larger environment in which Kant lived to the circumstances in Kant’s life, and from there to his thought and its consequences, is penetrating but remarkably clear. And this clarity is evident as much in Wenley’s language as it is in the structure of the book. Attractive as all this makes the book for the general reader, Wenley’s scholarly nature does present itself at critical points making the work as useful to the Kant specialist or the historian of philosophy.