Grigoriĭ Adamov

Grigory Borisovich Adamov (Russian: Григорий Борисович Адамов; born Abram Borukhovich Gibs; Абрам Борухович Гибс) was a Soviet science fiction writer, best known for his novels Conquerors of the Underground (1937), The Mystery of the Two Oceans (1939) and The Ousting of the Ruler (1946).