Two thrilling novels featuring scientist and world-saving explorer Doctor Ardan, created in 1928, five years before Doc Savage. These two ground-breaking SF adventures have been translated by award-winning authors Jean-Marc & Randy Lofficier. In The Troglodytes of Mount Everest (1929), young Francis Ardan, who has just earned his title of Doctor, embarks for a cruise around the world, but ends up fighting Captain Mendax, a science pirate and the master of a super-powered flying machine and submarine, The Astaroth, built according to the late Captain Nemo's designs. In The Giants of Black Lake (1931), Doctor Ardan comes across an underground city in Mongolia ruled by the fearsome Kyzyl Kaya, a 250-year-old scientist who has created a horde of giant spiders and other colossal creatures to guard his lair and conquer the world.