Well worth the purchase. Some may find the focus on the key HDR software packages a bit of a negative point. This is not so, it shows the author is covering the main player bases which appear to be in it for the long haul in this processing technique.
The book itself walks you through the process from capture (inc. equipement) to the final output. You can dip in and dip out at any point to suit yourself without fear of missing something.
Extremely useful book well worth the investment if you are taking advantages of the HDR process. It does focus on the photographic application of HDR not on the artistic interpretation opportunities of HDR, which suits me.