But my instructor just loves this coffee-table sized book he has.
Let's see if I can remember the premise right - it's by a non-dancer, who is a photographer, and it's his impression about ballroom dancing. I've glanced thru it and it has some great shots.
Ahh, a quick search thru amazon brought this up - Ballroom Dancing: The Romance, Rhythm and Style, from the descriptions it sounds right. Keyword "Ballroom" brought up nearly 150 books, BTW.