LOUISVILLE, Ky. (AP) - As a college student, Holly K. Dunn survived a savage attack by a rail-riding serial killer who left her for dead after her boyfriend was beaten to death. Twenty years later, Dunn is a wife, mother and author of a book retelling her tragedy in hopes it inspires resilience in others.

Dunn's life changed forever in August 1997 when Dunn and Chris Maier were attacked by Angel Maturino Resendiz - the notorious "Railroad Killer," linked to at least 15 murders and executed in Texas in 2006.

Dunn overcame the attack to graduate from the University of Kentucky in 2000, but instead of joining her family's hotel business, she became an advocate for victims of sexual assault and other violent crimes.

Now her story of survival and healing is recounted in the book "Sole Survivor."