No Man is an Island is the name of the book I am currently reading. It comes from a snippet of prose written by John Donne who has written some interesting stuff. Here is the larger context of these words, you may recognize another more famous book title in the same passage.
No man is an island, entire of itself;
every man is a piece of the continent, a part of the main;
if a clod be washed away by the sea, Europe is the less,
as well as if a promontory were,
as well as if a manor of thy friends or of thine own were;
any man’s death diminishes me, because I am involved in mankind;
and therefore never send to know for whom the bell tolls;
it tolls for thee.