In "Shopaholic Takes Manhattan" by Sophie Kinsella, the protagonist, Rebecca Bloomwood, navigates the challenges of her shopping addiction while pursuing a relationship with her boyfriend, Luke. A humorous and relatable narrative, it explores her internal struggles with finances, love, and self-identity amidst the backdrop of New York City.

The quote "If you're single, then I'm single? What's that supposed to be?" highlights Rebecca's confusion and the playful tone of the novel. It exemplifies the misunderstandings in modern relationships, often depicted with a comedic flair throughout the story, capturing the essence of romance and friendship in a light-hearted manner.