Three thrillers dealing in international intrigue. In “Operator Down” by Brad Taylor, Pike Logan learns that two members of his team, both former Mossad agents, are being targeted for assassination. in “The Take” by Christopher Reich, a Saudi prince is robbed on his way to the airport; missing are not only valuables but a sensitive document. A retired operative is hired to get it back. And in “Tom Clancy Power: and Empire” by Marc Cameron, a storm tossed American spy ship is at risk of falling into Chinese hands.