Jeff Ashworth

Everything I Need to Know I Learn...

Everything I Need to Know I Learned from Dungeons & Dragons

Year unknown

Game Master's Book of Instant Tow...

Game Master's Book of Instant Towns and Cities

Year unknown

Game Master's Book of Legendary L...

Game Master's Book of Legendary Locations

Year unknown Jeff Ashworth, Tim Baker, and Luke Eidenschink

Game Master's Book of More Random...

Game Master's Book of More Random Encounters

Year unknown Jeff Ashworth, Jasmine Kalle, and Robert "Bob World Builder" Mason

Game Master's Book of Non-Player Characters

Year unknown Jeff Ashworth, Jasmine Bhullar, John Stanko, and Jasmine Kalle

Game Master's Book of Random Enco...

Game Master's Book of Random Encounters (Special Edition)

Year unknown

Game Master's Book of Traps, Puzz...

Game Master's Book of Traps, Puzzles and Dungeons

Year unknown Jeff Ashworth, Kyle Hilton, Jasmine Bhullar, and Three Black Halflings

The Game Master's Book of Random Encounters

Year unknown Jeff Ashworth, Jasmine Kalle, and Michael Shea

The Game Master's Box of Unlimited Adventure

Year unknown

The Game Master’s Handbook of Pro...

The Game Master’s Handbook of Proactive Roleplaying

Year unknown Ginny Di and Jeff Ashworth