This book is dedicated to all you faithful readers who insisted on the return of Father Keller.

From San Mateo, California, to Pittsburgh, Pennsylvania, from McCook, Nebraska, to Milan, Italy—it didn’t matter where I went or which of my five books I was promoting, readers always asked the same question. “When are you going to take care of Father Keller?”

I must confess that five years ago when I wrote A Perfect Evil, I never dreamed it would make such an impact on so many of you. And so this book, A Necessary Evil is dedicated to all of you who have patiently waited for this long-overdue sequel.

Please consider this book my thank-you for an invaluable lesson that as writers and storytellers we do have the ability to breathe life into characters—characters who otherwise live only in our imaginations. And with that ability comes, perhaps, a certain responsibility to allow those characters to continue to breathe, to speak, to grow and even to be brought to justice.