Bibliography:Four color theorem

Popular account

• Robin Wilson, Four Colours Suffice. How the map problem was solved. The Penguin Press, 2002.

Introductory textbooks

• (with a detailed exposition of the early history of the problem)
  Rudolf Fritsch and Gerda Fritsch, Der Vierfarbensatz. Geschichte, topologische Grundlagen und Beweisidee.
    B.I. Wissenschaftsverlag, 1994.
  English translation: The four-color theorem. History, topological foundations, and idea of proof.
    Transl. from the German by Julie Peschke. Springer, New York, 1998.

• Robert A. Wilson, 'Graphs, Colourings and the Four-Colour Theorem. Oxford University Press, 2002.

• David Barnette, Map coloring, polyhedra, and the four-color problem.
    (The Dolciani Mathematical Expositions, number eight) The Mathematical Association of America, 1983.