books.google.com - The rapidly expanding area of algebraic graph theory uses two different branches of algebra to explore various aspects of graph theory: linear algebra (for spectral theory) and group theory (for studying graph symmetry). These areas have links with other areas of mathematics, such as logic and harmonic...http://books.google.com/books/about/Topics_in_Algebraic_Graph_Theory.html?id=z2K26gZLC1MC&utm_source=gb-gplus-shareTopics in Algebraic Graph Theory