I, Vampire by Aaron Pery
Price: $3.99 USD. 30680 words.
Published on September 13, 2011. .
When a Marine officer is bitten by a vampire he manages to kill it, but the vampiric virus he'd been injected with turns him into a Hybrid. He is then recruited to head a taskforce of other Hybrids to combat the recent proliferation of vampires across the country, which he does happily.
The Hybrids engages vampires in the US and globaly in a merciless fight until all the demons are eliminated.