I own the 'monitor madness' which includes many newer monitors.
The information is ok at best. There are some better troubleshooting guides/flowcharts/etc at arcarc.xmission.com.
There are a few monitors in the guide I had a very hard time finding any information for, however. It is hardly comprehensive, but there are some good articles/etc.
It is worth reading at some point, but not worth the $60, IMO. You would be better off getting a yearly subscription to the tech forums for an extra $19.