Ben Mezrich’s new book, “Straight Flush,” is barely out, and there’s already a film being developed based on his next book. Deadline.com reported Wednesday that 20th Century Fox is making a deal for “Seven Wonders,” a book Mezrich proposes to write about the seven wonders of the world. The action-adventure flick apparently would be part of a trilogy with Hollywood heavyweight Brett Ratner producing. Mezrich’s “Bringing Down The House” was turned into the movie “21” and his book “Accidental Billionaires” was the basis for “The Social Network.” “Straight Flush” is about a group of fraternity brothers who create an online gambling business and the shenanigans that ensue. Mezrich, who hyped the book on the “Today” show Wednesday, will do a signing Tuesday at Empire Asian Restaurant and Lounge. . . . In other movie news, The Hollywood Reporter says that Robert Schwentke, whose Boston-based paranormal buddy comedy “R.I.P.D.” comes out this summer, is in talks to direct an adaptation of “The Finest Hours” by local writer Casey Sherman and Michael J. Tougias.