Sixteen-year-old Susannah Simon is a mediator, one who communicates with the dead, and she also happens to be in love with Jesse, a nineteenth-century ghost.

When teenage heartthrob Luke Stryker shows up at a small-town Indiana high school to do research for a movie role, he persuades junior Jenny Greenley to use her considerable talents to try to change things at school for the better.

Nine-year-old Allie Finkle's list of rules helps her navigate a tricky situation with a new girl at school.

Princess Mia, struggling to come to terms with her recent breakup with Michael and prepare for an important speaking engagement at a gala for Domina Rei, finds solace and guidance in the diary of a teenage princess for Genovia, and discovers a secret that may change her country's history forever.

Fifteen-year-old Mia tries to figure out how to raise money for the bankrupt student government at her school while also worrying about how to become a "party girl."

Now a high school junior, Samantha tries to decide whether to continue dating David, the Presidents son, as she juggles a real job, art lessons, and a trip to Camp David for Thanksgiving.