The Evil Twin — George O. Bancroft

Owen Stanley and his team have fled Anaheim and ended up in Valley Center where they build a fortress that will keep them safe from any Followers of James who may have pursued them. But the followers would have been much easier to fight off in comparison to those they come in contact with in this quiet rural area.
First it's the Detroit gangster who blames them for killing his number one hit man, the closest thing he'd ever had to a son, in the fight that took place in the bottom floor of James's sanctuary.
Second a white supremacist that Stanley had encountered has his fortress blown to timbers.
Third there's Pete, a genius+ who has discovered 3D printing and nanotechnology and plans to merge the two and change the world. But Pete is connected to a money-laundering group that keeps coming on no matter how many the team takes out.
And in all this turmoil there are the romances that bloom and become very serious.