Impossibles - Randall Garrett Laurence M Janifer

FBI Agent Kenneth Malone is back with another case, this one involving a gang of car thieves that only steal Red 1972 Cadillacs. The only problem is that the thief, or thieves as the case may be, seem to have the ability to make themselves invisible. Of course that’s impossible, isn’t it? But with the help of the usual beautiful girl, Agent Boyd, and Queen Elizabeth I (Rose Thompson), Malone finds himself hot on the trail of the impossible. - Summary by Paul Hampton