From Publishers Weekly

This fourth and possibly concluding volume in Pohl's popular Heechee Saga takes place 100 years after the first, Gateway, when the discovery of abandoned alien spaceships opened the galaxy to human exploration. Now allies, human and Heechee, are guarding against the Foe, a race of energy beings that has already wiped out several civilizations. Millionaire Robin Brodhead, who has survived his physical death to become a computer-stored intelligence, tracks suspicious Foe-directed transmissions back to a Pacific island and the refugee children who have unwittingly carried the Foe to Earth. Robin's first contact with these beings becomes vital to human and Heechee existence. Although Pohl relies rather heavily on cute aliens and wise-guy computer programs, his restless, loquacious narrator Robin whips the reader from planet to planet and from past to future, rapidly solving problems and just as rapidly shoveling up new ones in the best Pohl fashion.
Copyright 1987 Reed Business Information, Inc.

Product Description

At last--the ultimate book in the renowned Heechee Saga!
Advanced Heechee technology had enabled Robinette Broadhead to live after death as a machine-stored personality, enjoying his life by flitting along the wires from party to party with a host of other machine-people. But suddenly his decadent existence ends when an all powerful alien race intent on the utter destruction of all intelligent life reappears after eons of silence, and threatens the lives of all heechee and humans. Even Robin, virtually immortal and with unlimited access to millennia of accumulated data, cannot discover how to stop these aliens. It began to seem that only a face to face meeting could determine the future of the entire universe....
THE HEECHEE SAGE
Book One: GATEWAY
Book Two: BEYOND THE BLUE EVENT HORIZON
Book Three: HEECHEE RENDEZVOUS
Book Four: THE ANNALS OF THE HEECHEE
The Gateway Trip: TALES AND VIGNETTES OF THE HEECHEE