What is the setting in the novel, The Talisman?

The backdrop of the entire story is that of America in modern times (with a few phrases that indicate the setting might feel more at home in the 70's and 80's), and then the magical realm known as 'The Territories'. The Territories is described as a smaller, more concentrated world than our own which appears to be based on a mythological/fantasy setting. This realm sits alongside America and is closely connected to it; so a prison in the mundane world could become a terrible work camp in the Territories, or a pleasant open stretch of roadside in America becomes a verdant paradisical meadowland in the Territories. The journey of the book takes place in a more or less straight line from the New England Coast across America to the West Coast, Venuti Point and California.