Informal book exchanges exist at nearly every port where cruising boats congregate. They are located in cafes, laundromats, marina offices, or clubhouses. They consist of impossibly random collections of the books that previous travelers have left behind. Naturally, they are heavy on pulp fiction, the best sellers, which occupy the greater portion of shelf space. But amongst the common, there are the rare gems, which provides the adventurous sailor/reader a chance to dip into an author or a subject which would never be considered in the land of unlimited choice. It is strange to pick up a book that is dusty, even grimy, and totally unknown, take it back to the boat, and discover a wonderful story in the slightly moldy, foxed pages. It is one of the lessons learned from travel - be open to odd serendipity.