Some of Your Blood by Theodore Sturgeon

Theodore Sturgeon

Source: http://www.physics.emory.edu/~weeks/misc/sturgeon.html

Some of Your Blood is a short horror novella whose protagonist, George Smith, is a sociopath. George is sent to the army psychiatrist after he attacks an officer. His mild manners contrast so much with the officer's report that Dr Philip Outerbridge decides he wants to delve deeper into this man's psyche to see what had triggered off such an apparently uncharacteristic reaction. He asks George to write his autobiography. George happily complies, but his narrative is as deeply false as it is true. The doctors realise that to find out George's secret, they have to read between the lines to discover what it is that their patient is hiding so carefully....

So, where is the vampire connection?
1. George's parents are Hungarian-American
2. His real name is Bela
3. George's 'problems' are deeply connected to his mother
4. Find out George's secret to learn more ...