He has written two pathology books for STARS, which also published Costanzo's Physiology book. He has taught board review (Step I and II) for Kaplan for almost 10 years (?) and is one of the foremost authorities on the USMLE. He is famous for his "Pathology in 40 hours", which is the 5-day course through kaplan, and his 40-page 'high-yield' facts. He also wrote many of the Pathology questions on the Board Simulator Series.
He currently: lectures at OSU-COM 😀 , does 6-8 board review sessions a year for Kaplan, edits the new Mosby's 'Rapid Review' series, writes the 'Most Commons...' series, and writes Pathology and Biochemistry texts for Mosby's.
All in all, the man is pretty good.