Dangerous Fairies. A Magical Snow Globe. Discover the Adventures of the Celtic Kids. Caitlin and Sean O'Brien are turning eleven. It's a special age for Fay Seekers, people who hunt and capture mischievous fairies. They are now old enough to find and rescue their parents from their prison in fairy. But to begin their quest, Caitlin and Sean must find and tame a Kelpie, the most dangerous of the water-fairies. The good news is they have a bit of magic on their side. The bad news is . . . so does the Kelpie.