The book is not intended as a comprehensive treatise, and is not a textbook in the classical sense. It provides a unique and unusual introduction to graph theory by one of the founding fathers of the subject. The opening chapter tells of the first problems worked on by the author and his colleagues (collectively know as the Trintity Four). Their interests in graph theory was aroused by a problem in a mathematical puzzle book. Beginning with an account of their work on the construction of perfect squares and rectangles, the subsequent chapters describe the developement of the author's ideas: the disproof of Tait's conjecture on Hamiltonian circuits, factorizing graphs, algebra in graph theory, symmetry in graphs, graphs on spheres, and chromatic eigenvalues. ' For over sixty years, Bill Tutte has worked in Graph Theory and he can truly be called father of the subject...This fanscinating book is an account of some parts of the theory in which he took special interest, and he reveals how he was lead to many of the Theorems and proofs for which he is famous' CMS Notes