Like some other Kyle thrillers, this Nazi-assassins-in-America novel begins intriguingly, then fades into standard fare. Young German pilot Ernst Zoll, courtmartialed for an involuntary act of WW I cowardice, is given life imprisonment, then released when the war ends. Zoll's family and bride refuse to see him, so the outcast goes to Argentina, becomes a pilot there--and later he takes over the identity of a dead American, marrying aviatrix Dot, settling in the States, flying test military planes in California. But when, in 1940, the Nazis discover Zoll's whereabouts, egocentric young German consul Von Galen urges him to help Germany. And, though Zoll would like to wipe out the black mark of cowardice on his Fatherland record, he fears Von Galen and flees to Canada. . . while Von Galen falls in with Britain-hating Irish-American O'Hara, who has figured out that Churchill and Roosevelt will be holding a big meeting at Newfoundland. Will Zoll take part in Von Galen's plan to assassinate the two leaders? Well, he does agree to a kamikaze mission in a test-plane, but wife Dot and a fellow pilot take off in pursuit and eventually knock him out of the air over Newfoundland. Crisp, sturdy suspense--with modest excitement and no surprises.