All The Vampire Formula books 1 to 4 in a boxset ready to binge read on KindleUnlimited. 


Bullied and broken, Jon Harper is given one chance to fight back—with a formula that turns him into something more than human. But every power has its price… 
The Complete Vampire Formula Saga – Reading Order:-  The Birth of Vengeance - Book 1The Truth of Vengeance - Book 2The Enemies of Vengeance - Book 3
The War of Vengeance - Book 4
Link Amazon.