In preparing this novel, I have drawn on the work of many eminent paleontologists, particularly Robert Bakker, John Horner, John Ostrom, and Gregory Paul. I have also made use of the efforts of the new generation of illustrators, including Kenneth Carpenter, Margaret Colbert, Stephen and Sylvia Czerkas, John Gurche, Mark Hallett, Douglas Henderson, and William Stout, whose reconstructions incorporate the new perception of how dinosaurs behaved.

Certain ideas presented here about paleo-DNA, the genetic material of extinct animals, were first articulated by George O. Poinar, Jr., and Roberta Hess, who formed the Extinct DNA Study Group at Berkeley. Some discussions of chaos theory derive in part from the commentaries of Ivar Ekeland and James Gleick. The computer programs of Bob Gross inspired some of the graphics. The work of the late Heinz Pagels provoked Ian Malcolm.

However, this book is entirely fiction, and the views expressed here are my own, as are whatever factual errors exist in the text.