All of them are essentially stand-alone stories. They don’t have to be read together or in any order, but for those that want to journey with this special orb through the galaxy, this is the trio. It also introduces Moonhunter and Balthier in Mystery of the Stardust Monk.
The “reading order” to follow the orb is:
Mystery of the Stardust Monk
This is a good place to start if you want to jump into my books but haven’t known where. This is an introduction to the Wells of the Onesong and the novihomidraks (new humans born of the dragons).