Purple Aces — Robert J. Hogan

Horror haunts the skies--and G-8, AMERICA'S FLYING SPY speeds into the darkness on his most desperate mission.

For captured American airmen, their faces a ghastly purple, are leading savage suicide attacks against their own men!

Backed by his Battle Aces, G-8 uses all his powers of disguise and daring to smash the devilish plot--and all his fighting nerve as his Spad takes to the air against the mystery staffel of the PURPLE ACES