Everyone knows that New York maintains one of the great library systems in the world - the two lions that guard the 42nd street library among the most important icons in the city. Less well known are a host of specialty libraries that have grown up around the rich intellectual and cultural life of New York City. There are a number of libraries that serve genealogical researchers, but also libraries catering to Spanish, German, French and Russian speakers. There is a library of books about dogs and one that is based on the work of Carl Jung. A library in Staten Island checks out tools to...