The Last of the High Kings (New Policeman Trilogy)

"Hello," said Alice, trying her best to sound friendly.

"What are you doing up here?" "I'm talking to the ghost," said Jenny.

Jenny has been making some strange friends lately. She's been walking barefoot through the wilds, talking to a huge white goat that wanders the Irish countryside. She's been chatting with the ghost of a young boy that guards the stone beacon at the top of the mountain. Her father, J.J. Liddy, knows these beings are connected somehow to the forces that are gathering around his homeland, plotting to destroy mankind. But will he be able to unravel the puzzles in time? Will he be able to secure the future of the last of the high kings? And is J.J. guarding some dark secrets of his own?