When a mysterious crystal goes missing, the Trills must join their skills-and their superpowers-to fend off the latest threat to their mountain home in the fourth book in the Trillium Sisters series perfect for fans of Mia Mayhem and The Wish Fairy.

While out in the forest, the Trillium Sisters are surprised when they see a ray of sunlight that seems to be shooting up from the ground. Curious, they go investigate and find a crystal as big as their hand embedded in the dirt, and a tunnel nearby leading down into the earth. Following the path, they’re amazed to discover what looks like the beginning of an underground farm.

Excited, they rush home to find their dad, hoping he can make some sense of this unusual sight. He tells them that he thinks the crystal directs sunlight underground so that food can be grown there year-round. This could be a huge development for their mountain community!

But when the crystal mysteriously disappears, the Trills must channel their powers and come together as a team to find it before it’s too late.