0449144763 1st printing mass market paperback from Fawcett. ~Good. No DJ, as issued. Mass-market Paperback. Light to moderate shelf wear to covers/corners; satisfaction guaranteed. When two male and two female supremely sensual, unspeakably cerebral humans find themselves under attack from aliens who want their awesome quantum breakthrough, they take to the skies -- and zoom into the cosmos on a rocket roller coaster ride of adventure and danger, ecstasy and peril.