Post apocalyptic sci-fi story where the MC is a scavenger looking for remnants of the fallen high-tech society. MC is aided by an augmented reality AI that makes a certain contract with him in the beginning. Unknown to the MC is that he is the 499th person the AI approached with the contract, apparently things did not go too well for the other 498.
Lots of action scenes and detailed descriptions of weapons and gear. Overall a great series if you like sci-fi action.