Book 14 was City of Dragons, by Robin Hobb. I realized that I was wrong, and it is not a trilogy. Bah. That makes my assessment of the previous book worse. Book 2 of a series of indeterminate length is too soon for a filler book. Book 3 was better, but it was odd to go from a book focused on only one plot line, to one that developed 3-4 new ones.