The Authors Take An Inclusive View Of The Subject And Present A Broad Selection Of Topics. These Range From Standard Classics, Such As The Characterization Of Line Graphs By Eigenvalues, To More Unusual Areas, Such As Geometric Embeddings Of Graphs And The Study Of Graph Homomorphisms. The Authors' Goal Has Been To Develop Each Topic In A Self-contained Fashion, Presenting The Main Tools And Ideas, With An Emphasis On Their Use In Understanding Concrete Examples. A Substantial Proportion Of The ...