German author and Catholic priest Andreas Knapp traveled to Iraq where he heard about a young boy who was brutally killed simply for his cross necklace.
"In Mosul, IS terrorists stopped a boy in the street because he was wearing a small cross around his neck. They ordered him to throw it away, and when he steadfastly refused, they buried him alive," Knapp wrote in his newly released book, The Last Christians: Stories of Persecution, Flight, and Resilience in the Middle East.
"Whenever I hear stories like this and meet Christians of such courage, I can't help but wonder: How much is my faith worth to me? How high a price would I be prepared to pay?"
The story is only one of the countless tragedies Knapp witnessed or heard about from survivors and church and human rights workers when traveling to Iraq to speak with Christians who are being wiped out for their faith.
He shares many of those shocking stories as well as accounts of incredible courage in his book.
"I never fail to be impressed by the deep faith displayed by Eastern Christians. For the sake of Jesus Christ, they have suffered all kinds of harassment and even given up their homeland. Friends and relatives — including children — have paid for their Christian beliefs with their lives," Knapp wrote.