After Jack moves with his mother to an old inn strange things happen. Including his grandfather who's there out of nowhere.
Intended I think for a somewhat younger, possibly MG audience, as the mystery was not spectacular, I still found it quite enjoyable. A haunted house, with mysterious hidden entrances and rooms. I would have loved it as a kid. This being said, I didn't like the fact that this book didn't seem to have an ending. Many of the great questions, like what exactly is his grandfather remain unanswered. Which probably would have been less of a problem had the author not referred to there being something for the course of the whole book. I hate it when the first book does this, since it feels like a trap to buy the other books in the series, especially since this was an Amazon freeby. (Honestly, if I liked the book even with some kind of closure, I'd read the sequel)
Another thing was the editing. I'm not a native English speaker so I'm far from the right person to address this, but I felt many sentences were missing words or didn't seem to make that much sense. I checked with other reviewers, and they apparently had the same problem, so it's not just me. It would be nice should an editor take a look at it.
Hawthorn Inn is the first book in the Catalyst series.