Here's a quick checklist of recent releases of
ACE SCIENCE-FICTION BOOKS
35¢
D-498 GALACTIC DERELICT by Andre Norton
D-504 MASTER OF THE WORLD by Jules Verne
D-507 MEETING AT INFINITY by John Brunner
and BEYOND THE SILVER SKY by Kenneth Bulmer
D-508 MORE MACABRE Edited by Donald A. Wollheim
D-509 THE BEAST MASTER by Andre Norton
and STAR HUNTER by Andre Norton
D-516 THE SWORDSMAN OF MARS
by Otis Adelbert Kline
D-517 BRING BACK YESTERDAY by A. Bertram Chandler
and THE TROUBLE WITH TYCHO by Clifford Simak