Also, just to add a counterpoint to Johnny's excellent set of suggestions, I'd also add that any Lightwave library should have the current copy of Dan Ablan's Inside Lightwave, and Nick Boughen's Lightwave 3D 7.5 (or 8) Lighting.
Inside Lightwave (ver: 6, 7 and 8)
http://www.amazon.com/exec/obidos/tg...books&n=507846
http://www.amazon.com/exec/obidos/tg...books&n=507846
http://www.amazon.com/exec/obidos/tg...books&n=507846
Nick Boughen's books:
http://www.amazon.com/exec/obidos/tg...books&n=507846
http://www.amazon.com/exec/obidos/tg...books&n=507846