He's also Margaret George's agent. AR&E lists him as having made sales of record for 20 clients (which is typically an underestimate, since not all sales are reported). Writer's Market says:
Established: 1975
Represents 50 clients
Currently handles 50% nonfiction; 50% novels
In fiction, he reps: Detective/Police/Crime; Historical; Juvenile; Literary; Mainstream/Contemporary; Mystery/Suspense; New Age/Metaphysical; Westerns/Frontier; Young Adult
How to contact: Query with SASE, responds in 2 months to queries.
Obtains new clients through recommendations from authors and other clients;
Takes 15% on domestic; 20% on foreign; charges for foreign postage and photocopying.
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He sounds like an interesting fellow, actually, and I've have no hesitation about contacting him.