Felicidade by Will Ferguson

A cynical editor at a struggling publisher discovers a self-help manuscript whose simple advice actually works, igniting a worldwide wave of contentment that upends habits, careers, and consumer spending. As the book’s runaway success sends markets into freefall and scrambles personal lives, he scrambles to find the mysterious author and stop the chaos, confronting the emptiness of quick fixes and the contradictions of modern consumer culture in a biting satire of the self-improvement industry.