Geoffrey Engelstein is a game designer and educator. His designs include Circle of Conflict, the Space Cadets series, The Expanse, and Super Skill Pinball. He has published several books on game design, including GameTek: The Math and Science of Gaming, Achievement Relocked and Game Production. He is on the faculty of the NYU Game Center as an adjunct professor for Board Game Design and has been invited to speak about game design at PAX, GenCon, Metatopia, and the Game Developers Conference, and is a co-founder of the Tabletop Game Designers Association. Isaac Shalev is the designer of board games including Tír na nÓg, Seikatsu, Ravenous River, Show & Tile, and more. He is also the host of We Got Played, a tabletop game design podcast, and a part owner of the boardgames studio Play To Z Games. Isaac runs Sage70, Inc., a data strategy and games-based learning consultancy that serves nonprofit organizations. Isaac lives in Cary, NC with his wife, three children, and a dog.