The author has visited hundreds of islands by sea and by air. In this book, he describes islands of the Aegean, the Mediterranean, Atlantic, the Americas, the Caribbean, and the South Pacific, noting the characteristics of climate, topography, history, and culture that make each island uniquely attractive. The single bridge that links all the islands is an ability to create in a visitor "a state of mind, a feeling of insularity, of escape ... an awareness that the most important feature of a given piece of land is that it is surrounded by water."