From the publishers website:
The underworld was once ruled over by the death god Hades, but he sleeps in his immortal tomb, weakened by centuries of neglect. What is to be done with his realm now? Who will refurbish its sepulchral halls, sweep away the corpse dust that coat its tenebrous terraces, and revitalise the dead that once walked its cheerless cloisters? Who else but you?
And what is to be found in the underworld?
Bone chilling winds sweep across desolate plains, carrying the despairing moans of lost souls to every corner of the realm of the dead. Swamps fester in the pale nacreous glow that rises up from the decaying earth, tombs litter the landscape like broken teeth, shadows walk the land, muttering in the darkness.
Here lie the houses of the dead, home to the shades of the deceased – and other things.