PERIL OF THE STARMEN by Kris Neville: Their space ships landed near Washington, and they met Earthmen with friendly smiles. It was a great day--and quite possible, our last!
TYRANTS OF TIME by Milton Lesser: Do dictators rise to power by accident? What if their ascendency is planned throughout history by men of the future who play with time as if it were a toy. And what if 1955 is their key year...