Described as the armchair explorers guide, takes a tour into the mines and caverns of North East Wales, includes colour photos on the Cover and black and white inside. The book is broken into chapters to include, Stone, Slate, Coal and Lead Mines, Bone Caves and Sporting Caves. There are nice underground photos of Gresford and Point of Ayr Colliery. There is also a neat photo story of the Grosvenor Caving Club getting blocked into Moel Ferna Slate Mine - be this a warning to inexperienced explorers even the ones that should know better make mistakes. The book is well produced and is a reasonable study many of the mines and Cave Systems in the area, although each site is probably worthy of its own photographic survey and study (PS)