Vicious Circle by Smith Wilbur

When Hector Cross's life is overturned, he immediately recognizes the ruthless hand of an enemy he has faced many times before. A terrorist group has re-emerged - like a deadly scorpion from beneath its rock. Determined to fight back, Hector draws together a team of his most loyal friends from his former life in Cross Bow Security, a company originally contracted to protect his beloved wife, Hazel Bannock, and her company, the Bannock Oil Corp. Together, they travel to the remotest parts of the Middle East, to hunt down those who pursue him and his loved ones. For Hazel and Hector have a child, a precious daughter, who he will go to the ends of the earth to protect. And brutal figures from the Bannock family's past - thought long-gone - are returning, with an agenda so sinister that Hector realizes he is facing a new breed of enemy. One whose shifting attack and dark secrets take Hector to the heart of Africa and to a series of crimes so shocking they demand revenge