To Poul Anderson,

In learning to write science fiction, I have had many great models, but Poul Anderson's work has meant more to me than any other. Beyond that, Poul has provided me and the world with an enormous treasure of wonderful, entertaining stories—and he continues to do so.

On a personal note, I will always be grateful to Poul and Karen Anderson for the hospitality that they showed a certain young science-fiction writer back in the 1960s.

—V.V.

I am grateful for the advice and help of: Robert Cademy, John Carroll, Howard L. Davidson, Bob Fleming, Leonard Foner, Michael Gannis, Jay R. Hill, Eric Hughes, Sharon Jarvis, Yoji Kondo, Cherie Kushner, Tim May, Keith Mayers, Mary Q. Smith, and Joan D. Vinge.

I am very grateful to James Frenkel for the wonderful job of editing he has done with this book and for his timely insight on problems with the earlier drafts.

This novel takes place thousands of years from now. The connection with our languages and writing systems is tenuous. But, for what it's worth, the initial sound in "Qeng Ho" is the same as the initial sound in the English word "checker." (Trixia Bonsol would understand the problem!)

The manhunt extended across more than one hundred light-years and eight centuries. It had always been a secret search, unacknowledged even among some of the participants. In the early years, it had simply been encrypted queries hidden in radio broadcasts. Decades and centuries passed. There were clues, interviews with The Man's fellow-travelers, pointers in a half-dozen contradictory directions: The Man was alone now and heading still farther away; The Man had died before the search ever began; The Man had a war fleet and was coming back upon them.