Access to the unstable Quake was supposed to be prohibited, but some very insistent travelers were determined to make the trip. Professor Darya Lang, who had made a career studying artifacts left by the long-vanished aliens called the Builders, had a hunch that during this unusal Summertide she might find the Builders themselves. Louis Nenda and the Cecropian Atvar H'sial had their own interests in Quake, and would do anything to get there. And Councilor Julius Graves was hunting murderers -- if they were hiding on Quake, he needed no one's permission to search for them.
Planetary Administrators Hans Rebka and Max Perry had no choice but to go to Quake themselves -- risking their lives to protect the others -- and to learn, just maybe, the secret of Summertide and the Builders . . .
"A well-made puzzle story in the manner of Arthur C. Clarke's Rama books." -- The New York Times



