The Ebony Door — Meg Hendry

Yali and Arlo have returned to Naeda to visit Arlo's family and to start their search for his father, but there is trouble in Cliffreach. A key believed to be one of the three keys to the Ebony Door has been found. The Trua Court has sent Yali's parents and her cousin to try and set things right between Trua and Naeda. Yali knows her cousin isn't interested in peace. The Ebony Door is a novella.