There is no doubt in my mind that this has been among the most challenging books I’ve worked on. The science fiction field has grown, diversified, and changed, which is a joy but means so much more work for everyone. For that reason, I’d like to thank my editor, Joe Monti, and the whole team at Saga, who have done such a great job with this book. I’d also like to thank my agent, the indefatigable Howard Morhaim, who is the best business partner I could wish for, as well as: the wonderful Liza Trombi and the entire team at Locus, who as always were extremely kind and generous; my dear friend and podcast co-host Gary K. Wolfe; Ian Mond; James Bradley; Rachel C. Cordasco, who knows more about SF in translation than anyone I know; John Joseph Adams, who provided assistance when he didn’t have to; Neil Clarke, who was enormously helpful; the wonderful Nisi Shawl; Kath Wilham and Timmi Duchamp at Aqueduct Press; Steven H. Silver, who provided invaluable information for the obituary section of my introduction; and all of the authors and their agents. A special thanks to my wife, Marianne, who helped with checking this book and my own shambolic introduction, and to my two daughters, for their understanding while I slew this particular beast.