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By William Foreman, Associated Press

GUANGZHOU, China — President Barack Obama's half brother has broken his media silence to discuss his new novel – the semi-autobiographical story of an abusive parent patterned on their late father, the mostly absent figure Obama wrote about in his own memoir.

In his first interview, Mark Ndesandjo told The Associated Press that he wrote "Nairobi to Shenzhen" in part to raise awareness of domestic violence.

"My father beat my mother and my father beat me, and you don't do that," said Ndesandjo, whose mother, Ruth Nidesand, was Barack Obama Sr.'s third wife. "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."

Like his novel's main character, Ndesandjo had an American mother who is Jewish and who divorced his Kenyan father. The novel, which goes on sale Wednesday by the self-publishing company Aventine Press, is one of several books in the works by relatives of the president.

President Obama's parents separated two years after he was born in Hawaii in 1961. The senior Obama, a Kenyan exchange student, divorced the president's mother, Stanley Ann Dunham, in 1964 and had at least six other children in his native Kenya.

For the past seven years, Ndesandjo has been living in the booming southern Chinese city of Shenzhen, near Hong Kong, and has refused all interview requests until now.

Ndesandjo, who said he attended Obama's inauguration as a family guest, declined to discuss his earliest memories of the president or describe their relationship over the years. However, he said he plans to meet his brother in Beijing when the president makes his first visit to China on Nov. 15-18.

"My plan is to introduce my wife to him. She is his biggest fan," he said.

Shortly after divorcing the president's mother, Obama Sr. met Nidesand while studying as a graduate student at Harvard University. Nidesand returned with Obama Sr. to his native Kenya in 1965, where Mark and his brother David were born and grew up. David later died in a motorcycle accident.

In Kenya, Obama Sr. also had four children with his first wife, Kezia, some of them while he was still married to Nidesand. Nidesand and Obama Sr. eventually divorced amid allegations of domestic abuse. Nidesand returned to the United States and later married a man whose surname Mark Ndesandjo took.

Obama Sr. died in an automobile accident in 1982 at age 46.

President Obama saw his father only once after his parents' divorce, when he was 10 years old. In a best-selling memoir, "Dreams from My Father," Obama wrote about his fatherless upbringing and search for identity.

In it, Obama described a visit to Kenya to meet his half siblings and learn more about his father. While painting his father as abusive, he called Obama Sr. a gifted but erratic alcoholic who never lived up to his intellectual promise or his family responsibilities.

Obama, in his book, also quotes Ndesandjo criticizing their father, saying, "I knew that he was a drunk and showed no concern for his wife and children. That was enough."

Ndesandjo, who is an American citizen, spent most of his childhood in Kenya before moving to the U.S. to go to college and work in telecommunications and marketing. He has a bachelor's degree from Brown University in physics and a master's degree in the same subject from Stanford University. He also earned an MBA from Emory University in Atlanta, he said.

"I see myself in many ways as a person who has many places, has feet in many places," he said.

Intensely private, Ndesandjo declined to answer several questions about himself. He even refused to give his age, saying only that "I'm younger than Barack."

With a trim, athletic physique, he has a strong resemblance to his taller brother in Washington. His left ear is pierced, and he wore a black crew neck shirt under a dark jacket to the interview last week.

Ndesandjo moved to China after the Sept. 11, 2001, terrorist attacks when his job was cut in the rocky U.S. economy. He taught English, immersed himself in the study of Chinese culture and volunteered as a piano teacher at an orphanage.

He now speaks Mandarin and said he earns a living as a consultant in strategic marketing, though he would not elaborate on his business.

Ndesandjo said the White House was aware of the book project. A White House spokesman declined to comment on Ndesandjo's interview or to discuss President Obama's relationship with his half brother.

The author said 15 percent of the book's proceeds would be donated to charities for children.

Closely patterned on Ndesandjo's own life, the novel depicts David, an American who leaves the U.S. corporate world after the 9/11 attacks to create a new life in China. He falls in love with a Chinese dance instructor and develops a bond with an orphan who is a gifted pianist battling a serious illness.

In the book, David also writes letters to his American mother asking for details about her failed marriage to his late abusive Kenyan father.

In one passage, Ndesandjo writes, "David easily remembered the hulking man whose breath reeked of cheap Pilsner beer who had often beaten his mother. He had long searched for good memories of his father but had found none."

Ndesandjo said such passages were drawn from his own experience.

"I remember situations when I was growing up, and there would be a light coming from our living room, and I could hear thuds," he said in the interview, tears welling in his eyes. "I could hear thuds and screams, and my father's voice and my mother shouting. I remember one night when she ran out into the street and she didn't know where to go."

Ndesandjo said his mother often called Obama Sr. "a brilliant man but a social failure."

The novel never mentions other wives David's father might have had. Nor does it include a half brother who would become the first black U.S. president.

On Wednesday, a week after speaking to the AP, Ndesandjo said at a book-launching news conference that his brother's election victory, among other recent events, helped "peel away the hardness" that he developed emotionally during his difficult childhood.

"I became proud of being an Obama," he said.

Since the election, he said the extra attention has changed his life, but he has coped by focusing on things that are important to him: music, writing, calligraphy and teaching piano to disadvantaged children.

"The simple things sort of help pull you through," he said.

Ndesandjo told the AP he didn't want to touch on any political themes in the book. "I think my brother's team is doing an extraordinary job and I really don't want to cause him additional heartburn," he said.

Besides the inauguration, he said he last visited his brother in Austin, Texas, before a debate last year with then-Democratic rival Hillary Rodham Clinton.

"He came up to me, and we hugged. I gave him a gift, a gift of calligraphy," Ndesandjo told the AP. "I was just thinking of how happy I was and how proud and how much I loved him."

"It was a very powerful experience."

Another of the president's half brothers, George Obama, 27, of Huruma, Kenya, has penned a memoir that will be published by Simon and Schuster in January 2010.

Other Obama relatives working on books include a half sister, Maya Soetoro-Ng, daughter of Obama's mother and her second husband, Lolo Soetoro; and Craig Robinson, first lady Michelle Obama's brother.

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Associated Press Writer Beth Fouhy in Washington and Tom Maliti in Nairobi, Kenya, contributed to this report.