This military cliffhanger from seasoned pro Henrick (author of 16 previous thrillers) gets a remarkable amount of mileage from an unlikely conceit: The heads of the world’s most powerful nations have gathered on board the Queen Elizabeth II for the latest session of the G-7 summits, and this time out the President of China is attending. Chinese hard-liners decide to scuttle their President’s plan to seek a rapprochement with the West. A Chinese submarine stalks the QE II and, at the same time, an unrelated group of terrorists seize control of the ship. A nuclear war between China and the West seems suddenly likely. Two brothers, Thomas Kellogg, an ATF agent, and Vincent Kellogg, a Secret Service agent trapped on the QE II, take the lead in untangling the various conspiracies and heading off a war. Henrick’s crisp pacing and rather infectious fascination with military technology go a long way toward overcoming wooden dialogue and generally unsurprising characters.