You can't go wrong with the queen of millennial YA, Meg Cabot, and the original The Princess Diaries! As the first book in the long-running series begins, Mia is an awkward, geeky freshman who discovers that her father's cancer treatment means he can't have anymore kids. Oh, and he's actually a prince, so by default, she's the heir to the Genovian throne. The romance takes a little while to kick in, as Mia struggles with crushes on entirely wrong guys before realising the right guy was there before she even noticed.