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Wangari Maathai was a Kenyan activist who was the first African woman to win the Nobel Peace Prize. She was also an author, and wrote several books about her life and work. Her books include "Unbowed: A Memoir" (2006), "The Challenge for Africa" (2009), and "The Tree of Life" (2010). Maathai's books have been praised for their insights into the challenges facing Africa and for their inspiring message of hope.