Classic Two Reel Shorts
For anybody interested in classic old-time two reel shorts I thoroughly recommend Brent Walker's new encyclopedic work "Mack Sennett's Fun Factory". This work contains Sennett's complete filmography with personnel and synopses for every film, considers Sennett's work in depth, and provides detailed biographies of supporting actors and technicians.
It considers his neglected talkies from the 30s in as much detail as his better known silent work. A work long in the making that is as good as anyone could wish for. Written by a real expert.