Lost Avergard — Meg Hendry

Faril is a dangerous place, full of secrets. Mel and his friends only saw the surface of the danger and the secrets. The forest of Faril is calling to Finn. An ancient satyr is after a power hidden beneath Faril, but that power is far more than it seems. It has plans of its own, and it intends to use Finn to get what it's after. Lost Avergard is a novella.