Disney’s $4-billion buy of Marvel a coupla years is bearing synergistic fruit:

Marvel and Disney-owned ABC announced today they are teaming for a graphic novel “inspired by” the hit crime series “Castle,” which of course stars geek fave Nathan Fillion as the mystery novelist Rick Castle.

Titled “Castle: Richard Castle’s Deadly Storm,” the book won’t hit your comic shop till Sept. 28 (aka the start of the fall-TV season) — but the Disney entities tease that you will be able to glimpse the book’s cover tonight on (where else?) the season finale of “Castle.” (Check local listings, blah-blah-blah.) You can also see the art right here.

Today’s news release touts the “unprecedented collaborative effort between Marvel, ABC Studios and the producers of ‘Castle,’ ” and further trumpets that “the adventures of Derrick Storm will be chronicled in an all new graphic novel from some of the most accomplished creators in the industry.”

Fair enough. The project features co-writers Brian Michael Bendis and Kelly Sue DeConnick; also on board: interior artist Lan Medina (“Fables”) and cover artist Carlo Pagulayan (“Planet Hulk”). According to the release, this “marks the first adaptation, in any medium, of the Derrick Storm novels.”

Says first-year Marvel EiC Axel Alonso: “It’s the kind of book that reaffirms Marvel’s commitment to creating new fans of comic books.”