Kazantsev was an enthusiast of the unknown, and a pioneer of Soviet
ufology. Many of his works, both fiction and non-fiction, deal with controversial scientific theories. He researched the
Tunguska event and published a number of science fiction, as well as
popular science books, on the topic. He believed the Tunguska impact was caused by an alien spacecraft that crash-landed on the Earth. Kazantsev researched events and legends that he believed were evidences of
paleocontacts with extraterrestrials. His novel
The Destruction of Faena, an adaptation of
Shakespeare's
Romeo and Juliet, is based on the hypothetical planet
Phaeton that some believe existed in the orbit of modern
asteroid belt. According to the novel, Phaeton was inhabited by a developed civilisation of the
phaetae race, who survived the destruction of their planet and brought some of their culture to the prehistorical people of Earth. Kazantsev was also interested in the
Martian canal theory, and used it in his fiction concerning Mars. He was also a composer of chess
endgame studies. In 1975 he was awarded by the
Permanent Commission of the FIDE for Chess Compositions (PCCC) the title of International Master of Composition. ==Bibliography==