Frank and Joe investigate the legend of Whalebone Island when they receive a warning concerning a sunken freighter.

Mermaid princess Lily is about to renounce her place in the royal succession of the undersea kingdom of Thalassina and spend her life on land with the boy she loves, until her annoying cousin appears and throws her decision into doubt.

Caught in their motorboat the Sleuth by a sudden storm at sea, Frank and Joe Hardy are helpless when the engine conks out. Drifting farther from shore amid the tumultuous waves, the boys are relieved to see the lights of a yacht. But their SOS is ignored. The shrill sound of a siren fills the night air. Moments later, a helicopter drops an object alongside the Sleuth. To the young detectives' astonishment it proves to be a wallet containing two thousand...

While on vacation in California, sixteen-year-old best friends Anna and Frankie conspire to find a boy for Anna's first kiss, but Anna harbors a painful secret that threatens their lighthearted plan and their friendship.

Seventeen-year-old Darcy Covington never had to worry about money or where her next shopping spree was coming from. Even her dog ate gourmet. Then one day, Darcy's car is repossessed from the parking lot of her elite private school. As her father's business hit the skids, Dad didn't just skip town, he bailed on his family. Fortunately, Darcy's uncle owns a thrift shop where she can hide out from the world. There's also Lucas, the wickedly hot fix-it...

Fifteen-year-old high school sophomore Marisa, who has an anxiety disorder, decides that this is the year she will get what she wants--a boyfriend and a social life--but things do not turn out exactly the way she expects them to.

In the wake of the Second Wave, the angel menace escalates driving Alex and Willow to Mexico City where they connect with a fledgling group of angel killers who, although they accept Alex as their leader, remain skeptical of Willow, who is keeping a big secret.

In Hong Kong, Chan Tze Man, called Simon Chan, leaves high school because he can't master English, but when he befriends Amy, a Chinese- American who knows little Chinese, their unlikely bond gives hope to both.