A quality manual on cave diving, encompassing diving beneath rock, under ice and within wrecks – anywhere with an overhead environment. A book by a master cave diver packed with tips and clear, concise advice. Diving in Darkness has gone down as well within the diving world as it has in caving; if you are an open water diver considering venturing beneath a roof, this is your source of safe advice. No diver can fail to learn something from this work.