Black Moon by Kenneth CalhounRead about the other entries on the list.
In another novel about the sleepless apocalypse, our narrator Biggs has just lost his wife Carolyn to an insomnia that is wreaking havoc across the nation. Sleep has become a precious commodity in this world. The telltale signs of red-rimmed eyes, slurred speech, and a clouded mind have yet to manifest in Biggs so he while he can still sleep and dream he sets out to find Carolyn–encountering others fighting against sleeplessness along the way.
--Marshal Zeringue