The Shadow Dancers

Description for THE SHADOW DANCERS by Jack L Chalker:

IT WAS THE ULTIMATE CASE: TO STOP THE ULTIMATE DRUG...

I'm Horowitz. Brandy Horowitz. My husband Sam and I are private eyes who take cases for G.O.D., Inc.---the outfit that runs the Labyrinth to infinite alternate earths filled with crime, danger...and murder.

Power-mad fanatics are running a narcotic V.C. that spreads like a bug, works like a drug, and one touch hooks you for good. You don't become a junkie....you become a zombie. 'Cause this monkey's not just on your back, but in your brain---it's got a mind, and if you kick it, it kicks back with madness and death.

So this beautiful black PI and wonderful Jewish sleuth have to smash the source before the drug-bug reaches our client's Home World. But the opposition's got take Sams and Brandys set up in headquarters on the two worlds that hold any possible leads: one that never heard of civil rights...

And one ruled by the Nazis.