Police Procedural. Based on the popular ABC television Series Castle
, this novel is purportedly written by Rick Castle (who's totally fictional, but is played on TV by actor Nathan Fillion). Though it isn't clear who's actually
writing these meta-mystery books, readers don't seem to mind. In her 2nd bestselling outing in book form, tough and sexy NYPD homicide detective Nikki Heat and hotshot reporter Jameson Rook (who -- pay attention, here -- is the fictional version of the fictional Rick Castle, who supposedly wrote this book) are on the trail of a murderer in Manhattan. Fans of the witty TV drama know that several real-life crime writers have appeared on the show, usually playing poker with Castle; Michael Connelly, a big fan of the show, is one of them.