Retribution — Ian Barclay

Book #5 in the Ian Barclay series. An entire American family cut down in the sleepy Dutch countryside. U.S. tour groups shredded to ribbons outside Buckingham Palace's stately halls and in Paris' bustling marketplace. all courtesy of the New Arab Social Front, a splinter group of the PLO determined to keep European countries from signing a treaty that could end terrorism once and for all.