I recently finished reading José Saramago's Seeing, a novel slightly connected to Saramago's Blindness, for which he is best-known.  From Wikipedia:

Seeing is a story set in the same country featured in Blindness and begins with a parliamentary election in which the majority of the populace casts blank ballots. The story revolves around the struggles of the government and its various members as they try to simultaneously understand and destroy the amorphous non-movement of blank-voters.

This story had an intriguing start for me but seemed to get bogged down...and therefore ultimately was much less engaging/interesting than Blindness.