A very decent introduction to Kant's Critique of Pure Reason. You should be aware, however, that rather than being a purely scholarly study, it attempts to find the gold in Kant by re-working some of his arguments into more modern, palatable form, following the style of the analytic philosopher P. F. Strawson in his book The Bounds of Sense. Far better, by a million miles, than the virtually unreadable Kant's Critique of Pure Reason: A Reader's by James Luchte.