Invader - Albert Fay Hill & David Campbell Hill - 1981 Jove Books Paperback

Condition: Acceptable. Please see the images for more details. Cover art: Blurb: “DESTINATION: EARTH i t comes from a distant star. The Earth hangs before it in the vast blankness of space, vulnerable... and doomed. Unless-Eanh's major powers can unite behind the brilliance of one man-scientist Christian Nilstrom-and devise a way to repel this mysterious, unspeakable force. THEY DIDN'T KNOW WHAT IT WAS. THEY ONLY KNEW WHAT IT WANTED- EARTH.”