Татьяна Трофимовна Викентьева - "STOLEN IMMORTALITY"

The book tells the story of how a Jewish boy, Yasha Levin, and a Russian boy, Sasha Zavidov, met, became friends, grew up together, and fell in love with the same girl But later, Aleksandr Zavidov stole a scientific discovery from his friend Yakov Levin—one that guaranteed immortality to mankind—and began using it for personal enrichment and world domination. The reader will find out what came of it in the next few books of this series.