ISBN ?

"Earth's been a paradise too long -- it's time for another revolution! The Falkner Generator gave humanity the stars -- but only at near-light speed. And there's the rub.

"Doran Falkner, Humanity's Savior (retired), gets the startling news: On a boring little planet, the creatures called 'lugs' are engaged in instant teleportation. If Doran can unravel the lugs' secret, humankind will once again have new worlds to conquer!" [jacket blurb, US pbk, 1985]