Skylark DuQuesne

"Scientists Dick Seaton and Marc DuQuesne were the deadliest enemies in the galaxy. Their feud had blazed among the stars and changed the history of a thousand planets. But now a threat from outside the galaxy drove them into a desperate alliance as hordes of strange aliens stormed through space on a collision course with Man. Seaton and DuQuesne fought side by side to fend off the invasion--as Seaton kept constant, perilous watch for DuQuesne's inevitable double-cross..." --pg 4 of cover.