Bridget Hustwaite’s book, Figuring Out Thirty, which explores the chaotic and transformative experience of transitioning from one's twenties to thirties, drawing heavily from her related podcast. Key themes addressed in the book include the challenges of heartbreak and significant life changes, such as a major break-up right before turning thirty, as well as the astrological concept of Saturn return, which is often associated with intense personal upheaval and self-re-evaluation. Hustwaite candidly discusses topics like career fulfillment, the pressures of the modern dating scene, and the evolving nature of friendships and family estrangement in adulthood. Furthermore, the book examines societal expectations surrounding marriage, fertility, and body image, incorporating personal anecdotes, listener contributions, and perspectives from experts and other public figures.