* Skellig is a mysterious and magical being. He is described as "half-dead" and "half-alive" and seems to have the ability to heal Michael, the main character, from a mysterious illness.
* Skellig's presence is temporary. He appears in Michael's garage and eventually disappears, leaving behind only a single feather.
* The book focuses on Michael's personal journey. He is a young boy who is struggling with his own mortality and the fear of losing his father. Skellig becomes a symbol of hope and a reminder that there is more to life than what we can see.
Interpretations of Skellig's disappearance:
* Skellig's presence was always meant to be temporary. He was there to help Michael heal and then moved on to other things.
* Skellig died. His departure may have been a sign that he was no longer able to sustain his physical form.
* Skellig went back to where he belonged. Some believe he is an angel or other supernatural being who was visiting Earth on a specific mission.
The beauty of the ending lies in its open-ended nature. Each reader can interpret Skellig's departure according to their own understanding of the story and their beliefs.
Ultimately, the question of where Skellig goes is less important than the impact he had on Michael's life. His presence taught Michael about resilience, acceptance, and the power of hope.