Hilary Williams is pure country music royalty. The daughter of Hank Williams Jr., she was busy pursuing her own career ambitions to follow in her father's and grandfather's footsteps, when a horrific car accident in 2006 shattered her plans. Traveling with her sister, Holly Williams in March of 2006, en route to a family funeral, the SUV they were riding in hit a rough patch of pavement and rolled four times before landing on its roof.

Now, four years, 23 surgeries and a grueling schedule of painful therapy sessions later, the tenacious young woman has chronicled her long journey to recovery in a new book, 'Sign of Life: A Story of Family, Tragedy, Music and Healing.'

'Sign of Life' is also a song Hilary wrote while in the middle of her arduous recovery. "When I was in the hospital, I was complaining to the doctor, 'God, I'm in so much pain,'"she recalls. Her doctor's response, "Pain is a sign of life," became the catalyst for her healing.

Her father, who refers to Hilary as "the strongest person I know," (quote via Nashville's Tennessean), sings the praises of his daughter in the book's foreword. "People think her Daddy is tough?" he boasts. "No, nothing like my daughter."

The book, scheduled for a November release, is only part of Hilary's comeback. The busy singer-songwriter -- who counts fellow artist Kellie Pickler among her closest friends -- is also moving full-speed ahead with her music career, including collaborating with famed DJ and producer, Leko, for a dance remix of 'Signs of Life.' Hilary continues to perform in and around her hometown of Nashville.