Adam Gr. The Mystery of the Two Oceans. In Russian /Adamov Gr. Tayna dvukh okeanov. Series: Library of Adventure and Science Fiction. M. Detgiz. 1954. 480s. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalb627d73b4b3e273ec.