This 3-panel, hardback screen contains the most useful charts and tables from the Hollow Earth Expedition core rulebook so that Gamemasters will always have the information they need right at their fingertips. It also includes a 16-page booklet with a new sample adventure set on dying and dangerous Red Planet. The Revelations of Mars Gamemaster Screen is the perfect accessory for every Hollow Earth Expedition game, no matter what planet it is on!