In a vivid blend of the natural and supernatural, author William Roberts has created an enchanting tale, set in Wales over one thousand years ago, when one really could say 'here be dragons'! Thomas and Caitlin are brother and sister, spirited children of farmer Evan and his wife Gwyn. Expressly against their parents' wishes, they decide to explore the local caves and are soon lost in the maze of tunnels ...After many adventures, during which they are trapped by a monster lizard, and terrified by a giant spider, they stumble on a den of dragons who befriend the children and tell them how, centuries before, dragons were expelled from the forests by men and forced underground. The pair are led back to the surface and repay the dragons' kindness with a dramatic rescue...In this they are aided by Emrys, an ancient sorcerer, once apprentice to the great Merlin himself...