@Override
	public String toString() {
		return ("isbn -> " + isbn) + "\n" + "tile -> " + title + "\n" + "author -> " + author
				+ "\n" + "pages -> " + pages + "\n";
	}
@param pages The pages to set.
extensions/spring-xd-extension-cassandra/src/test/java/org/springframework/xd/test/domain/Book.java