I'm trying to assess if it's feasible for me to read all RIPD (Rest in Peace Department) comics before I see the movie.
So far, unless I'm hugely mistaken, there appear only two publications: A single RIPD comic book that the movie is based on, and a 4-issue prequel called "City of the Damned".
Is that correct and exaustive? (as of 10/2013)