Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Creative, focused on equipment and techniques.

Good book. Lots of equipment information - good for choosing the right flash. It's a shame that Susan, the author, uses in almost all photographs a Nikon N90 and a SB26 flash, which I think limits *a little* the book. If you have such equipment, you'll be delighted, and if you don't you can still learn a lot about other flashes, but you won't have so many examples and technical detail. Still worth to buy.