This novella was a delightful read. I would target it mostly for the middle school/YA crowd as the storyline, characters and writing seemed perfect for that group. As an adult I still found the story engaging. I liked the typical good vs. evil approach and felt interested in the characters, especially Siobhan and Alicia. It was a bit predictable in spots as I could definitely see where the story was headed, but that did not detract from my enjoyment of it. I think that this story could be fleshed out into a full fledged novel, and if handled correctly, even a good YA series.