An enthralling, dishy novel about ambition, sexuality, and the rise of a capitalist empire in post-Gilded Age New York.

"Hernan Diaz's Trust but make it gay? Narrated in the sly-eyed style of Plain Bad Heroines? I am absolutely buying what this book is selling, an epic and intimate tale of three secretly queer aspiring business titans who band together-and in the case of two of them, marry-to build an empire." -Electric Literature, Most Anticipated Queer Books for Spring 2025

At the turn of the 20th century, Vivian Lesperance is determined to flee her hometown of Utica, New York, and live a life worthy of the society pages she writes for. When she meets Oscar Schmidt, a queer middle manager at a soap company, Vivian finds a partner she can guide to build the life she wants--not least because Oscar will leave Vivian to tend to her own romances with women.

But Vivian's plans require capital, so they approach Oscar s old-money rival, Squire Clancey. Together they found Clancey & Schmidt, a preeminent manufacturer of soap, perfume, and candles. When Oscar and Squire fall in love, the trio form a new kind of partnership.

Vivian reaches the pinnacle of her power building Clancey & Schmidt into an empire of personal care products while operating behind the image of both men. But exposure threatens, and all three partners are made aware of how much they have to lose.

For fans of The Gilded Age and Succession "who wished the show was both kinder and gayer" (Jessie Wright, Copper Dog Books), Mutual Interest is a brilliant, beguiling story of desire and power.