Don't miss the next Galaxy Magazine!
THE BIG ENGINE
by Fritz Leiber
CRITICAL MASS
by Pohl & Kornbluth
THE RAG AND BONE MEN
by Algis Budrys
And many more, including Willy Ley science column and the great
conclusion of Poul Anderson's THE DAY AFTER DOOMSDAY! February _Galaxy_
on sale December 10th--ask your newsdealer to reserve it for you!