 Thus, it was natural that Berge quickly followed
up on this work with two larger volumes, Th´eorie des graphes et ses applications
[2] and Espaces topologiques, fonctions multivoques [3].Th´eorie des graphes et ses
applications [2] is a master piece, with its unique blend of general theory, theorems – easy and difficult, proofs, examples, applications, diagrams.It is a personal
manifesto of graph theory, rather than a complete description, as attempted in the
book by K¨onig [31].