Taking advantage of the Soviet archives, which were opened in the 1990s, Siddiqi has written a groundbreaking work that examines why the Soviet Union fell behind in the space race of the 1960s after changing the course of human history with the first artificial satellite launch, Sputnik, in 1957.

Read More Challenge to Apollo: The Soviet Union and the Space Race, 1945 to 1974 – Free e-book