Thanks as always to my family: my mother and father; Jim Hill and Kate Connor; Nao, Tim, David, and Ben; Melanie, Jonathan, and Helen Lewis; Florence; and Joyce. Thanks to those who read and critiqued and pointed out anachronisms or inconsistencies: Kelly Link, Clary, Delia Sherman, Holly Black, Sarah Rees Brennan, Justine Larbalestier, Robin Wasserman, Maureen Johnson. Thanks to Lisa Gold, Research Maven (lisagoldresearch.wordpress.com) for her help. Thanks to Joey Yeung and Huan Yu for the Mandarin translations. Thanks to Wayne Miller for Greek and Latin help. My always gratitude to my agent, Barry Goldblatt; my editor, Karen Wojtyla; and the teams at Simon & Schuster and Walker Books for making it all happen. And of course, thanks to my husband, Josh, for keeping Linus and Lucy from eating the manuscript.