Acknowledgements
Inspiration for this book originally came from two sources. The first is Kip Thorne’s ‘Black Holes and Time Warps: Einstein’s Outrageous Legacy’, where he speculates that one end of a wormhole, if accelerated to relativistic speeds, might allow for a form of time travel. The second is a piece written by Ray Kurzweil for edge.org, concerning the idea of transmitting information at greater than light speed.
Considerable thanks are owed to Phil Raines and Jim Campbell for ideas, suggestions and comments while I worked on an earlier draft of this book. Much gratitude is also extended to Ian Sales, whose detailed comments and suggestions helped keep me from falling on my face more often than I might have when it came to many of the finer technical details in the second half of the book. Any errors that remain are the responsibility of the author alone.
I should also say a debt of thanks to the staff at Tor past and present, particularly Julie Crisp and Peter Lavery, whose careful attention to detail and copious notes went a long way to making this book what it is.