Outlaw World
New York : Popular Library, 1969. –
126 p. ; 18 cm. – (Popular Library ; 60-2376)
Cover: Frazetta
“A sinister super-being in a hidden world sets out to demolish the Solar System” — Cover
DREAD PERIL FROM BEYOND DEEP SPACE
Where are they from and what is their ultimate evil purpose?
A band of dread invaders, led by a ruthless genius, is overcoming the system, sapping it of radium – its most vital element – killing all who stand in the way. Captain Future must find their base – their Outlaw World – and crush their deadly plot. He is the last hope in a crumbling solar system.
Book Reviews:

• World of IF. 19(8):147. October 1969. (L. del Rey)

• Science Fiction Review. 35:38. Februry 1970. (C. Brandon) [full text]