This is the audio of a seminar by ENnie winner Lowell Francis, ageofravensgames.com, talking about planning and running TTRPG mysteries. It's about 60 of talk followed by a Q&A. Lowell talks about his approach and best practices for running mysteries in rpgs. Topics include:

• Kinds of mysteries (set, set variable, improv)
• Plotting mysteries
• The power of the timeline
• Info handling
• Keeping players involved
• Table management and more.

You can find an outline of the talk here.