Fourteen-year-old Artemis discovers an unraveling time tunnel connecting demons with the earth. These imps have sworn revenge on humans generations ago, and their unpredictable appearances threaten to expose the entire fairy world (not to mention put the human world at risk as well). Artemis is called into service to help the fairies figure out when and where the demons will be and outsmart his latest nemesis. Worse, there is an evil demon overlord looking to take over the human and fairy worlds.
Book five in this series is such an excellent book, which is a major accomplishment for any author. By book five many authors are running out of new and exciting ideas but Colfer finds a way to keep things fresh and exciting. Best of all, he adds two new, promising characters–one of them a love interest for young Artemis. (We have seen Artemis mature, but for the first time we are seeing him grow up as well.)
The book ends with the best feel-good moment of the series yet, developing Artemis and Holly’s relationship further than ever before. Their story has come so far and continues to be as exciting as when we first started it.