Occult Assassin: Damnation Code (Book 1)

Occult Assassin: Damnation Code (Book 1) - William Massa A marine finds his fiancee murdered in what appears to be a cult related activity.
As he digs deeper he is introduced to a billionaire also trying to fight against the darkness.
With his eyes being opened to what is happening, the marine goes on a revenge mission but he needs the help of his new ally to be able to overcome it.

A good start to a series, the action keeps going and the characters are well done. The marine and the billionaire complement each other in their skills. The main villain is a bit two dimensional but the idea behind the story was original.