When Dee Forest moves to Misty Island, she becomes friends with a thirteen-year-old girl ghost, Louisa Lockwood. Together, they search for Louisa's living relatives so she can rejoin her family. Will they find them before the ghost man?.
Convinced that the fatal accident she witnessed at the basketball game was not accidental, thirteen-year-old Chelsey, a paraplegic, and her unusual friend Jack join forces to prove it was a deliberate murder.
While trying to prove he can survive on an island off the coast of Maine, Chris Fossett meets Joellen Roth, who has come to the island with her father to work on a puffin research project, and the two become caught up in a mystery surrounding the island's 150-year-old ghost.
When Sam and Dave Bean, amateur detectives, try to find the person who's been stealing jewelry around the neighborhood, their suspicions center on a foreign exchange student in their class at school.
Ten brief cases allow the reader to match wits with ten-year-old crime-buster, Encyclopedia Brown, as he investigates such cases as whether a diary of George Washington's mother is authentic, or if a UFO picture supposedly taken by the army is real.
When a thief steals money from her mom's Garbage Busters project, Stephanie, a sixth grader, identifies herself as "Stevie Diamond, Detective" and sets off to find the culprit.