In the following network, nodes are characters in Victor Hugo's famous 1862 novel.
Characters are connected if they encounter each other in chapters
of the book.
Jean Valjean -the main character- is a hub in the network,
but also that he is one of a kind, no other characters have similar
acquaintances.
Compare this to Babet and Geulemer, and Claquesous three ruffians that
governed together the third lower floor of Paris from 1830 to 1835.
They are surrounded by a green circle, signifying
that they form a clique: they are all connected to each other.
But also they have similar acquaintances such as Eponine and Brujon.
Javert, who is the cop in the story is connected -among others- to these three,
but also to other characters such as Montparnasse,
an associate of the three ruffians, the Thenardier Couple,
Fauchelevent, and others.
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Legend:
(Network data from the Stanford GraphBase, Donald Knuth, 1992)