The World Swappers

<b>From the first page of the Ace Double:</b> "All we want is your planet! The inhabited galaxy was caught in the crushing vice of a struggle for power. The political titans of the planets of mankind were making their bids for supremacy. <p>The contestants: Counce, man of strange powers, authority in the spheres of the intellect; and Bassett, man of money-power, financial and business wizard. <p>As the association of human worlds drew near the teetering edge of internal revolutions, one of these men would be in a position to triumph. The only thing that neither side could foresee was that there were <i>Others</i> hovering among the stars, looking for worlds to conquer!"