Publisher Blurb: Covering decades of Carter’s time in Helium, before his heroic “death” and later resurrection, this book covers characters, places, and events covering the very end of A Princess of Mars up through The Warlord of Mars. This sourcebook provides expanded discussion and character background options for playing Red Martian, Okar, and Firstborn characters. Includes advice on running adventures during the lost years that pass the end of A Princess of Mars and the beginning of The Gods of Mars to help Narrators and players create adventures that are uniquely their own but also true to the tone and spirit of Burroughs' Barsoom.