XMLElement xml;

void ProcessBooks(XMLElement foo)
{
    // do smthng...
}
//-----------------------------------------------------------

void ProcessStuff(XMLElement element)
{
    XMLElement aaaas = element.getChild(0);
    println(aaaas.getName())
}
//-----------------------------------------------------------

void setup() {
    size(200, 200);
    Books = new XMLElement(this, "sites.xml");
    int child_count = books.getChildCount();
    if (child_count < 2)
        return;

    ProcessBooks(books.getChild(0));
    ProcessStuff(books.getChild(1));
}
//-----------------------------------------------------------