D.I. Telbat continues the COIL Series suspense in Dark Vessel, Book 4, when COIL founder Corban Dowler is forced underground after he is the target of a car bomb. On the streets of Manhattan, his vigorous covert investigation begins when his Muhammad ibn Affal alias is compromised. But the knot of darkness he hopes to untangle is more sinister than he could imagine. Italian spook, Luigi Putelli, rises to the COIL challenge, and attempts to stand vigil in Corban's absence. Luigi scours the world to help those in need—even when his past threatens to stop him. From New Jersey, to Bangladesh, to Nigeria, Luigi is determined to serve Corban's God. Chloe Azmaveth, ex-Mossad agent, hunts down every clue she can find to locate Corban. The web of deceit grows complicated as a government agency goes rogue to cover up a deadly secret. The closer she gets to Corban, the more her hope wanes, and it seems that Corban Dowler may be beyond saving!