18-year-old Allegra Brooks has skyrocketed to fame after starring in a hit television show, and she's the overnight success that everyone's talking about. They just don't know she's autistic. And now all she wants is a normal teenage summer.

Her destination for escape is the remote Lake Pristine and its annual Book Festival, organized by the dedicated but unfriendly senior bookseller, Jonah Thorne.

In small towns like Lake Pristine, misunderstandings abound, and before long the two are drawn into high-profile hostility that's a far cry from the drama-free holiday Allegra was craving. Thank goodness for her saving grace: the increasingly personal emails she's been sharing with a charming and anonymous bookseller who is definitely not Jonah Thorne . . .