In Simone Elkeles' book "How to Ruin a Summer Vacation," the theme revolves around transitions and new beginnings. The quote, "The end of one thing is just the beginning of another," highlights the idea that when one chapter of life closes, it opens the door for new opportunities and experiences. This sentiment is crucial for the protagonist, who faces significant changes throughout the story, offering readers a sense of hope and renewal.

As the main character navigates challenges during the summer vacation, the quote serves as a reminder to embrace change. The narrative illustrates that endings can be bittersweet but ultimately lead to growth and transformation. Elkeles captures the essence of adapting to new situations and finding joy in what follows, reinforcing that every conclusion is merely a prelude to new adventures.