Vtg 1950s Lot 3 Ace Double Novel Books First Edition Science Fiction Invaders.

Lot includes 3 vintage (1953-1963) Ace Double Novels; Finish the book, flip it over, read another book!

All are in good vintage condition; extreme yellowing, wear on covers, some dog earring, but no missing pages. I found no pen marks or extraneous writing within, and spines are good.

Titles and authors:

THE EARTH IN PERIL stories by Leinster, Van Vogt, Kornbluth, Hamilton, etc.

paired with WHO SPEAKS OF CONQUEST by Lan Wright

SENTINELS OF SPACE by Eric Frank Russell

paired with

THE ULTIMATE INVADER AND OTHER SCIENCE FICTION by

Eric Frank Russell, Murray Leinster, Frank B. Long, and Malcolm Jameson

WARLORD OF KOR by Terry Carr

paired with

THE STAR WASPS by Robert Moore Williams