WHEN WE LOST OUR HEADS

The all-consuming friendship of two upper-class girls in 19th-century Montreal.

Marie Antoine and Sadie Arnett grow up in the Golden Mile, a wealthy neighborhood where Marie is the daughter of the richest man in the city while Sadie’s family struggles to keep up appearances. Psychopathic Sadie easily manipulates the spoiled Marie Antoine. Sadie’s mother recognizes this darkness in her daughter and abandons her to it: “Sadie would pretend to have feelings to get what she wanted. That was how manipulative Sadie was.” The girls confide in each other, push the limits of acceptable behavior, and are “delighted by their indecency.” Yet theirs isn’t a loving friendship. They’re competitive rivals: “Every decent friendship comes with a drop of hatred. But that hatred is like honey in the tea. It makes it addictive.” When they accidentally murder a maid while pretending at a duel, Sadie is sent overseas. A strict boarding school shapes her identity, and her youthful perversions blossom. The first half of the book is a slow build, concentrating more on character development than action. Sadie returns from boarding school as an adult and takes up residence in a whorehouse in the Squalid Mile, a foil to the girls’ upper-class neighborhood. Marie inherits her father’s sugar factory and becomes a coldhearted boss. In its second half, the book takes on too many ideas without bringing them together. A plotline involving a trans character’s search for identity is given surface-level treatment. Sadie releases a sadistic roman à clef about “the violent delight of female desire,” and women across the city awaken to either their sexual power or their need for safe working conditions, but not both. Marie and Sadie lock themselves away from the world, while a pretender to Marie’s throne plots her demise. Ideas about girl power, friendship, gender identity, class, sexual sadism, mistaken identity, and the dehumanizing nature of the Industrial Revolution compete for center stage in this overlong tale with a predictable twist ending.

There are insightful observations about friendship, but disconnected ideas gum up the works.