However , as sociologist James W. Loewen writes in his book on the subject , it is impossible to precisely count the number of sundown towns at any given time , because most towns have not kept records of the ordinances or signs that marked the town 's sundown status .
However , as sociologist James Loewen writes in his book on the subject , it is impossible to precisely count the number of sundown towns at any given time , because most towns have not kept records of the ordinances or signs that marked the town 's sundown status .