This is what I read on lazy Sunday afternoons.

A very concise (and almost readable!) work by Kant, summarizing and clarifying some of the monstrous and intricately detailed trails of thinking from his masterwork, The Critique of Pure Reason. Lays out the groundwork for the philosophy of science, logic, and metaphysics. ( )

this is the abrigded version of pure reason. as said in my review of groundwork of the metaphysics of morals kant is a hard read but worth while read ( )