Rachel Adcock is a survivor of Hodgkin's Lymphoma and the author of the book "Pain with Purpose." Her experience with cancer, as well as a few other twists and turns, led her to write the book as an optimistic commentary on how difficult and painful situations in her life always ended up fulfilling a greater purpose. You can find the book "Pain with Purpose" on Amazon for exactly $8.03, and all proceeds go to the American Cancer Society. Here's Rachel.