I owe a debt of gratitude to Frank White for his enormously generous assistance in reviewing my manuscript and helping me to greatly improve the final product. I thank William E. (Bill) Burrows for his insightful notes on the text and help in opening publishing doors for me. I thank my brother Christopher who is the real writer in the family, as well as an accomplished actor. His help and encouragement were essential to bringing my manuscript to satisfactory completion. I also thank my brother Richard whose somewhat brutal critique spurred me to go further to the edge. I thank my editor, Erin Medlicott, who did a wonderful job cleaning up the text and making insightful suggestions. Erin’s help is especially significant to me as she copy-edited two books for Dr. Gerard K. O’Neill whose vision of human colonization of space inspired the modern space movement. I also thank other reviewers who came to my aid with corrections after the novel was initially available in eBook form, including Rand Simberg, John Walker, Jeffrey Kramer and one of my oldest friends in the space movement, Gary Oleson. And finally, I thank Shelley Souza whose acute editing and comments on early draft chapters inspired me to redirect the structure of the story, which made for a much stronger narrative.