While this was billed as a horror novel by Tor in 1987, 'weird fiction' might be a better classification regarding genre. Set in a small town in PA called Merridale, Ash Wednesday starts with a bang, when one night blue glowing 'ghosts' of dead townspeople suddenly appear, either where they died, or some (like those killed in Vietnam) at their various 'hang outs', like a park bench. The ghostly blue figures are all nude and quite vivid, displaying for the world how they died.
Of course, the town folk panic, dogs start yowling, and no one knows what to do. After the rather explosive beginning, however, the story coalesces around a handful of locals and Williamson tells their stories and reactions, and rotates POVs accordingly. Confronting the dead obviously unsettles many people in the town, and about 1/3 simply pack up and leave; the remainders are almost forced to rethink the meaning of death and perhaps beyond this, why such an event occurred.
Ash Wednesday is not a conventional ghost story by any means as the ghosts just 'are', and the many scientists and so forth can only say the spectrum of light that makes them glow. The real gist the novel is how the town folk react. For some, it induces a profound guilt, seeing the dead loved ones they abandoned in life, or their dead parents 'sitting' at the table, etc. The appearance of the ghosts shakes the local priest's faith, and rekindles some rather bad memories in a Vietnam vet.
Williamson does an excellent job here regarding how national media, evangelists, and political figures react to the strangeness in town; the town (and its 'ghouls') quickly becomes a national phenomena, only to fade when no one can explain why the 'ghosts' appeared, and yes, the ghosts just 'are'-- not moving or changing an iota. Some folks place curtains around them to hide their presence as they try to get on with their lives. Some murders are shown in a new, ghostly blue light that instigates some confessions. Ash Wednesday really focuses upon the sociological reaction to the ghosts rather than the ghosts themselves...
This is well written and the characters really come to life in a believable way, but the story just seems to meander and ends without any meaningful denouement. Very interesting read, but do not expect a horror novel here. 3 ghostly stars!!