“An expert juggling act . . . Idiosyncratic and engrossing throughout.” —Stephen Markley, New York Times Book Review

“Halcyon is an entertaining thought experiment, and Ackerman writes with a gentle, graceful style . . . Ackerman delivers a potent critique of the what-if nature of talking about history . . . Ackerman, as much as any working novelist today, is invested in getting the facts of war and history right.” —Mark Athitakis, Washington Post

“A blend of counterfactual history and futurism and a way to think about some of our thorniest social and cultural issues today.” —Jeffery Gedmin, American Purpose
 
“Frightening, funny, and thought-provoking.” —Mark Braude, The Octavian Report

“Ingenious . . . Elliot Ackerman prefers challenging questions over convenient answers, leaving ample room for readers to engage in leaps of imagination as bold as the ones he’s undertaken . . . Blending alternative history with science fiction, Ackerman artfully explores several provocative issues that have become flash points in contemporary America.” —Bookpage

“Thought-provoking . . . Visionary.” —Publishers Weekly

“A novel of ideas in an age of opinions.” —Kirkus Reviews
 
“A thoughtful and fascinating thought experiment, one that explores mortality, fate, and the malleability of historical memory.” —Booklist