Penguin, New York, 1991, 1^st pr thus.  ISBN 0-14-012184-6.  Trade soft cover, 392 pages including Notes, Selected Bibliography, and Index.  Good plus; light edge and cover wear, small corner bends and curling to laminate at tips, bit of soil on outer page block; binding sound.  Interior clean and unmarked; black & white map and photos; some straightened corner bends.  ‘An adventure-filled ten-year journey to discover the meaning of darkness in the mysterious black images of divinity’ (from rear wrap)