$14.99 The Game Master’s Handbook of Proactive Roleplaying: Guidelines and strategies for running PC-driven narratives in 5E adventures By Jonah Fishel, Tristan Fishel and Jeff Ashworth
$23.99 The Game Master's Book of Non-Player Characters: 500+ unique bartenders, brawlers, mages, merchants, royals, rogues, sages, sailors, warriors, weirdos and more for 5th edition RPG adventures (The Game Master Series) By Jeff Ashworth
$29.99 The Game Master's Book of Legendary Dragons By Aaron Hübrich, Dan Dillon, Cody C. Lewis, James J. Haeck, Jim Pinto and Jeff Ashworth