Nightmare Blue

I found a worn copy of Nightmare Blue recently in a used book store. I was familiar with Gardner R. Dozois because of his annual Year's Best Science Fiction anthologies, but hadn't read any of his own work. Nightmare Blue was a pleasant surprise; Dozois and his coauthor, George Alec Effinger, wrote a very good story.
Basically, the story is a cross-genre mix of crime and SF. Nightmare blue is a drug, a terribly addictive drug. It is the perfect slave drug because one hit and you are hooked for life. If you don't get it you die – it is that simple. Unfortunately nightmare blue has started showing up on Earth. An unlikely duo, Jaeger a human PI and Sendijen a lobster-like alien, have to find and stop the source. The stakes are sky-high.
Recommended.
(I just found out that Baen have reissued an ebook version.
http://www.baenebooks.com/p-1772-nightmare-blue.aspx)