Oprah Winfrey Friend Questions New Tell-All Biography

April 12, 2010— -- As Oprah Winfrey prepares to break into nighttime television, her good friend Gayle King gently chided a new tell-all biography due to hit stands this week.

"I'm thinking it's not going to make her book club selection," King told "Good Morning America" today.

King said she had not read the Kitty Kelley book, "Oprah," but "when I heard she interviewed 850 people, I'm thinking, Oprah doesn't even know 850 people."

Winfrey did not talk to Kelley for the book.

"Oprah has been so forthcoming about her life," King said. "It's not that she's tried to hide anything, so we shall see."

But the focus for Winfrey is now the buzz surrounding OWN, the Oprah Winfrey Network, which will feature Winfrey's new evening show, "Oprah's Next Chapter."

Her audience was dismayed by the news that "The Oprah Winfrey Show" would end in September 2011 after 25 years on the air, and media-watchers wondered what was next for Winfrey.

OWN will be a 24-hour cable channel that Winfrey will guide mainly from behind the scenes.

"My vision for OWN is to create a network that inspires our viewers and makes them want to be who they are on their best day," Winfrey, 56, said in a statement Thursday.

Click here for more information on O's 10 Anniversary celebration.

Each edition of "Oprah's Next Chapter" will release her from the studio for conversations and travel around the world.

Winfrey, a media mogul, co-founded the Oxygen network and launched the Oprah magazine, which is simply known as O magazine. The monthly publication marks its 10th anniversary next month.

"Oprah's Next Chapter" is scheduled to premiere in late 2011, shortly after she ends her weekday talk show.

A joint venture of Winfrey's Harpo Inc. and Discovery Communications Inc., OWN is set to premiere Jan. 1 on what is now the Discovery Health Channel. OWN will be available in about 80 million homes.