Cover for Season of Mists by Neil Gaiman

Ten thousand years ago, Morpheus condemned a woman who loved him to Hell. Now the other members of his immortal family, The Endless, have convinced the Dream King that this was an injustice. To make it right, Morpheus must return to Hell to rescue his banished love — and Hell’s ruler, the fallen angel Lucifer, has already sworn to destroy him.

In my mind this is the cycle where Gaiman really starts to enrich the mythos he’s created, pulling in gods and myths from around the world into an intriguing storyline that amounts to a supernatural political thriller. About my only complaint, here, is that, much like The Dollhouse, the ending comes way too easily, in this case with a literal deus ex machina.