"This Odyssey book series explores the history of the much-loved character John Avery Whittaker. The series introduces newcomers to the larger world of Odyssey. For readers who are already Odyssey-philes, the novels provide the history of the franchise's most important character. Whit and his family (father, Harold; stepmother, Fiona; half-sister, Charlie) have just moved to Provenance, NC, in the middle of the Great Depression. Harold will be teaching...

While preparing for a unit on storytelling, the mermaids of Trident Academy learn of a legendary pirate treasure in their own city and Pearl decides to find it, despite a warning that it is guarded by a ghost.

Preparing for a trip by plane with Bill, the four children inadvertently go into the wrong plane, which takes off under frightening circumstances -- and find themselves stranded in an isolated valley scarred by war, and at the mercy of sinister men looking for a long-lost treasure.