4 Stars • Avery Grambs, a high school senior, inherits a billionaire's fortune from Tobias Hawthorne, a man she never met. She must live in his mansion with his four grandsons—Nash, Grayson, Jasper, and Xander—while solving puzzles to uncover why she was chosen. The book explores family secrets, rivalry, and Avery's journey to understand her unexpected legacy, leaving many mysteries for subsequent books in the series.