The next step is to create an event iterator:
int eventType = xmlr.getEventType();
while(xmlr.hasNext()){
eventType = xmlr.next();
//Get all "Book" elements as XMLEvent object
if(eventType == XMLStreamConstants.START_ELEMENT &&
xmlr.getLocalName().equals("Book")){
//get immutable XMLEvent
StartElement event = getXMLEvent(xmlr).asStartElement();
System.out.println("EVENT: " + event.toString());
}
}