Graham Masterton 
Manitou Blood [EPUB ebook] 

An army of the undead threatens humanity. In one of the hottest summers for decades, New York City is swept by a strange and terrible epidemic. Doctors are helpless as victims fall prey to a bizarre blood disorder. They can no longer eat solid food, they become hypersensitive to sunlight and they have an irresistible need to drink human blood. As panic grips the city, psychic Harry Erskine must enter the shadowy realms between the living and the dead, and call on native American spirits to help him… 'One of the most original and frightening storytellers of our time’ PETER JAMES. 'A true master of horror’ JAMES HERBERT.