Nicholas and Alexandra: An Intimate Account of the Last of the Romanovs and the Fall of Imperial Russia is a 1967 biography of the last royal family of Russia by historian Robert K. Massie.
Massie was inspired to write the book after his own son, like Tsarevich Alexei, was diagnosed with hemophilia.
In 1971 the book was adapted to film, also as Nicholas and Alexandra.
In 1995, in his book The Romanovs: The Final Chapter, Massie updated his account of Nicholas and Alexandra with much newly discovered information.