Debbie Ford Debbie Ford

Debbie Ford, the self-help author of The Dark Side of Light Chasers, died Sunday, according to The Associated Press. She was 57.

Ford, who also penned eight other books, died Sunday in her San Diego, Calif., home after a long battle with cancer. In a statement posted on Ford's website, her sister Arielle says that Ford was "brilliant and very brave," but that "she was tired and ready to go."

Photo Gallery: Celebrity deaths in 2013

"She had accomplished her mission, even though she would have liked more time with her son Beau, her family, her devoted Julie, her gazillion friends and many beloved co-workers and community members," the statement read. "Her legacy and work will live on through the programs she developed and through her loving and devoted staff at The Ford Institute for Transformational Training."

Read the full statement at