Faerie Wars is by Herbie Brennan. The first book in the Faerie Wars Chronicles. Pyrgus is the son of the Purple Emperor, the king of Faerie. He is more interested in animals than running the kingdom and spends most of his time outside the palace disguised as a commoner. In our world young Henry Atherton is struggling with his family's disintegration. He spends his time working for old Mr. Fogarty, a former bank robber and mechanical genius. When Pyrgus is translated to Mr. Fogarty's yard, Henry and Mr. Fogarty must help Pyrgus save the faerie kingdom from an assassination attempt and a demon invasion. A rather scientific take on fantasy. A good start to a promising series.
Ratings: 8th grade - 8 out of 10 - AC (some mature thematic content).