Philip José Farmer's Doc Savage: His Apocalyptic Life was the starting point for my lifelong fascination with Farmer's Wold Newton Family concept of many popular characters belonging to the same, widespread genealogical family, Dave Stevens' The Rocketeer was the impetus for the idea of the Wold Newton Universe (many more characters inhabiting the same continuity, but not necessarily related to the Wold Newton Family members), and was literally the very first entry in what now is Crossovers: A Secret Chronology of the World.
I've picked up a lot of books from Phil's estate since his unfortunate passing last year, most of them signed by Phil and most of them related to his Wold Newton mythos. Some have been non-PJF books, inscribed to Phil, such as a copy of the British edition of Bunduki signed by J.T. Edson to Phil, and a hardback of Raymond Chandler and Robert B. Parker's Poodle Springs, signed by Parker to Phil and Bette.
So when Mike Croteau wrote me last night asking if I'd like a hardcover of the Eclipse Comics edition of Stevens' Rocketeer graphic novel (collecting the first storyline which features an unnamed appearance of Doc Savage and his aides), signed "For Philip José Farmer, With Great Respect, Dave Stevens"... let's just say he had me at "hello."
This one is particularly special for me.