I Am Not Spock is Leonard Nimoy's first autobiography. Published in 1975, between the end of The Original Series and the production of The Motion Picture, the book received criticism from some fans due to the perception that he was rejecting the character Spock. In reality, he maintained he was only clarifying the difference between himself and Spock, whom he always enjoyed playing. However, he later published I Am Spock in an attempt to address the misconceptions.