The Question and Answer section for In Cold Blood is a great resource to ask questions, find answers, and discuss the novel.
The importance of Holcomb is to establish that this crime takes place in "the heartland" of America. By establishing such a brutal crime in such a formerly peaceful and innocent setting, the author demonstrates that there is no place in America...
Herb Clutter is a successful farmer.
Unfortunately I can't think of any songs that relate to the very dark themes of this book.