I've never been a huge Gaiman fan, but I've only read American Gods and Norse Mythology. One of my issues with American Gods is how colossal the scope feels, only to kind of peter out at the end. Neverwhere is opposite. It builds this small, intimate universe that's equal parts anxiety-inducing and grotesquely charming. The universe reminded me of the wackier portions of The Dark Tower universe, humorous situations with a sinister edge. The ending is more about the hero's journey that the surrounding plot (which is fascinating in its own right). The dialogue is also hilarious throughout, and lightens much of the constant tension of the plot. I'd definitely recommend for anyone looking for a dose of urban fantasy mixed with Alice In Wonderland vibes.