If you'd like to do further reading about the Silent Hill saga I'd recommend some good readings for you:
*The Psychology of Silent Hill A psychological/philosophical essay of many SH aspects based on some real books by Freud, Carr, Jung, etc.
*Silent Hill Plot Guide by Dan Birlew (President Evil) An excellent plot analysis related to the first game.A must read for every Silent Hill fan out there.
*Silent Hill Plot Analysis by Orca782 and cvxfreak A complete in-depth analysis of the people and events involving the first three games.
*A plot analysis for the "Silent Hill" series by SilentPyramid Based on psychological human behavior, the author of this plot justifies the town's "behavior" focusing primarily on human's behavior and pathologies. An excellent reading indeed.