SAN DIEGO — The bestselling author of self-help book “The Dark Side of the Light Chasers” has died in San Diego. Debbie Ford was 57.

A family spokeswoman said Ford died Sunday in her home after a long battle with cancer.

“The Dark Side of the Light Chasers” spawned a self-help enterprise for Ford. The 1998 book aimed to help readers overcome their darker side.

Ford wrote eight more books, led workshops and hosted TV and radio shows. She often shared her battle with drug addiction, divorce and other personal struggles in her work.