Wanted: Info on Wraeththu

I saw at Barnes & Noble the other day the Orb one-volume reissue of Wraeththu by Storm Constantine, and have thought about buying it. I notice it is similar to stories like the BotNS and Dying Earth in that it takes place in a far future Earth different and yet similar to our own. Has anyone on this list read it? Maybe you could inform me as to whether to buy it or not. Orb reissues as supposedly the classics of science fiction, but I hadn't previously heard of this book. Thanks, Christopher Culver