Special issue devoted to selected papers presented at the First IPM Conference on Algebraic Graph Theory, April 21-26, 2007, Tehran, Iran. Special editors are Gholamreza B. Khosrovshahi (IPM and Tehran University), Bojan Mohar (Simon Fraser University), and Peter Rowlinson (Stirling University). Submission deadlie is August 15, 2007. Further details available at the conference. Responsible editor-in-chief is Richard A. Brualdi.