This book is interesting in that it shows you how much can be done with the ghazal. Some of the poems are very good, but some, for me, show up the weaknesses a ghazal is prone to, mostly in being forced.
There are a number of ghazals from William Matthews whereas two would have been enough. He's a terrific poet but here he became tedious.
If you're interested in writing ghazals, this is great to have since it shows what works and what doesn't.