Fifth in McGuire's October Daye series. In this one, Toby tries to avert a war between water-based and land based fae, by locating and rescuing the kidnapped children of undersea nobles. I love the mythology and cast in this series, though I think a sterner editor would help. And speaking of stern opinions, it seems that finishing the book has caused me to neglect local canine/squirrel relations, an oversight I must remedy immediately.