This book is not only a major contribution to science but a very readable journal of discovery. The ten-year exploration of Cordell Bank by Robert Schmieder and the volunteer divers of Cordell Expeditions opened up a whole new world for those interested in our vital coastal marine resources. The knowledge acquired by this enthusiastic group led to the establishment of the Cordell Bank National Marine Sanctuary. Indeed, the exploits of this group of explorer-divers rivals those of well-known historical adventurers of the past.