Three old blokes. One Irish castle. And a thylacine under the sink.The Windy Mountain trio head to Ireland expecting to trace family roots and maybe score a castle or two. What they don't expect is a Tasmanian Tiger making itself at home in Donegal.Was St Patrick so busy chasing out snakes that he forgot to deal with striped marsupials?Book 4 in the Windy Mountain series is a rollicking mix of mystery, mischief and marsupial mayhem.