Bansi O'Hara and the Bloodline Prophecy

Bansi O'Hara is visiting her granny in Ireland, when very strange things start to happen. First there is the swan that seems to be following them from the ferry, then the strange little man who appears in her bedroom and says he's a brownie (a type of hobgoblin) called Pogo. Things get even stranger when Bansi finds out that her birth fulfilled an ancient prophecy from Tir na n'Og, the land of the fairies, and that the wicked Lord of the Dark Sidhe wants to spill her blood on fairy soil. Bansi, Pogo, and Tam, a handsome fairy who can change into animal form, cross through the gate that separates the two worlds to try and make the prophecy come true for the good fairy peoples. But the Dark Lord is waiting for them.