The third book in the hilarious New York Times bestselling middle-grade series set in the world of law-breaking leprechauns from actor and writer Thomas Lennon Ronan Boyle may be the youngest detective of the secret Garda, but now that he's saved the captain from a spooky cult, he's also the only detective that has the head of an old Irish god in his vastsack! But his adventures are far from over. His parents are still on the...