For Gods' Sake

There's going to be trouble. Alien gods have decreed that all the mortals in the Polyverse must be integrated for their own good. Zeus is really upset about it, which doesn't bode well for anyone who gets in his way. Storm clouds are gathering over Mount Olympus. The alien mortals charged with implementing the Integration Plan are not happy about it either and plot sabotage. Their first step, obviously, is to build a brothel in an out-of-the-way village on planet earth.
A high-ranking diplomat is murdered in the brothel and this leads to a godswar that will destroy the earth, purely as a side effect, of course-it's nothing personal. Annihilation is assured unless Amelia Maybury, spinster of Little Howling, can solve the murder and save the world. The task will pit her against gods and aliens. The gods may think themselves immortal, and they may be pretty good at hurling thunderbolts, but sometimes they're a bit thick, so outwitting them should be fairly straightforward.
The aliens, on the other hand, are tricky devils. Amelia will have to watch her step.