When King Jaron returned to Carthya he brought with him a device that supposedly shows the way to a great treasure, but now everything is going wrong: Castor, the son of an old enemy, is conspiring against him and wants the throne for himself, his fiancée, Imogen, seems to have turned against him, and the Prozarian Monarch has invaded his kingdom and taken Jaron's castle--but Jaron has a lot of experience at hiding and escaping, and he is not willing...

Twleve-year-old private investigator Fletcher Moon, nicknamed "Half Moon" because of his shortness, must track down a conspiracy or be framed for a crime he did not committ.

Twelve-year-old Jackson Opus is descended from two powerful hypnotist bloodlines, but he has just begun to realize that he can control other peoples' actions with sometimes frightening results--especially when the head of the Sentia Institute plans to use Jackson for his own benefit.

When Zeke returns to space to go on a secret mission for the director of the Confederation of United Planets, chaos ensues.

In 1910, Audacity Jones is an eleven-year-old orphan living a monotonous life at Miss Maisie's School for Wayward Girls, and wondering why nothing exciting ever happens--but when the mysterious Commodore Crutchfield whisks her away to Washington D.C., she finds herself involved in a sinister and dangerous plot against the president of the United States.

As the plague decimates London in 1665 and an assassin threatens the apothecary's life, apprentice Christopher Rowe and his faithful friend Tom, following a trail of puzzles, riddles, and secrets, risk their lives to untangle the heart of a dark conspiracy.