I agree to look at work by the masters; For "light", there is none more renowned than Rembrandt, though many exude the similar control and quality.

One book that I recall was "The Shape Of Content" by Ben Shahn
http://www.amazon.com/exec/obidos/tg...book_4657301_1

http://en.wikipedia.org/wiki/Ben_Shahn

Overall I believe composition is not easy to teach or learn from a single book, but by practice and patience once the concepts are grasped.

Shapes...light...relationships...balance...