In an interview with the Associated Press, Mark Ndesandjo, half-brother of president Barack Obama, revealed that his father, the late Barack Obama Sr., was physically abusive. Ndesandjo, who leads an intensely private life as a business consultant in China, admitted that his recent semi-autobiographical novel, Nairobi to Shenzhen, is based on his own abusive relationship with his father — a subject president Obama touched on in his 1995 memoir, Dreams From My Father. “My father beat my mother and my father beat me, and you don’t do that,” Ndesandjo told the AP. “It’s something which I think affected me for a long time, and it’s something that I’ve just recently come to terms with.”