"A twisted, perverse story that's difficult to put down...you'll be desperate to know what [the characters] do next." --Buzzfeed

"Delightful...The plot satisfies with twists and turns to the end, but it's the audaciousness of spirit emboldening most of [O'Neill's] female characters that makes this novel shine." --New York Journal of Books

"These perversely fascinating characters are filled with guile and bile and many things vile, and even though it's virtually a certainty that they are star-crossed, it's impossible to tear one's gaze away." --BookPage

"O'Neill's sharp descriptions and her prose's archaic slant successfully immerse readers in the period...this distinctive, character-driven story is delightfully perverse." --Publishers Weekly

"O'Neill uses evocative descriptions and near-constant tension to carry this dark almost-fairy-tale to anunexpected conclusion." --Booklist

"With irreverence and charm, O'Neill takes us into the vivid worlds of Sadie and Marie, unlikely friends who find themselves in the thrall of shared dark passions, threatening to destroy all they have come to know. When We Lost Our Heads is a lovely, uncanny take on the historical novel, told with O'Neill's trademark wit and empathy for human foibles." --Esi Edugyan, author of Washington Black

"A dazzling, delicious dream...penned with equal parts arsenic-laced icing and blood. There are marvels and dark delights on every page as O'Neill masterfully unfurls the lifelong love affair of Sadie and Marie, whose tale is illuminated by the triumphs of female desire over the crushing designs of men. The spell this novel casts is irresistible." --Mona Awad, author of All's Well

"I am struggling to say how much I loved this book...It is a beautiful, alarming, outraged, outrageous, dancing, laughing, shrieking, bellowing, howling, gobbling piece of wonder. What a joy!" --Edward Carey, author of The Swallowed Man