1986 0-88946-304-2 The history of epistemology from Hume to Kant, written by Justus Hartnack, who is universally recognized as one of the most distinguished philosophers of our time.
1992 0-7734-9483-9 A thoroughgoing categorical objectivism is presented and defended, which is still articulate enough to declare roots and methods in liberal tradition, analytical philosophy, as well as in Hegelian dialectic. Produces a consistent argument, uniting a diverse philosophical heritage while maintaining political integrity. This is a first rate study by a mature philosopher, and should gain standard stature.