The Mission Earth Volume 3: The Enemy Within

Earthlings: Beware! Do you know who your enemies are? Your neighbor? Your boss? Your butcher? Your wife?
In this web of espionage, intrigue and betrayal, even Voltarian Royal Combat Engineer Jettero Heller doesn't know who he can trust. He's hard at work creating a gasoline substitute to fuel his '68 Caddy in a Long Island automobile race — a development that could have dramatic consequences for the entire human race. As such, he poses a grave threat to the powers that be.
Beset by double-crossing body doubles and backstabbing identity shifters, Heller discovers that the most dangerous battle of all is about to begin... against The Enemy Within.
A must buy — American Library Association