title: The Sixth Key
author: Perkins, Sue
description: Kidnapped, taken to another planet - how much worse can Riley's life get?
   The kidnapper is her boyfriend Jothur and Sacral is his home planet. The castle are psychic, mainly telepaths, and they are at odds with the Mutes in the forest. The psychics wish to discover how Riley blocks her thoughts as this will help them completely eradicate the Mutes who are a mixture of free telepaths and non-telepaths.
   Riley seeks help from the Mutes and she meets Tynan, their leader. She hopes he will help her escape the tests the telepaths want to make to discover her ability to block. Instead she discovers the magic of Sacral is dying due to an imposter being on the throne.
   Riley and Tynan work together to discover the real king and place him on the throne. Part of the plan relies on Riley returning to the castle to delve for more information. Will she survive or will her mind be torn apart by the tests?