Hostile Territory by Marie James

Can you call someone an enemy if you haven’t seen them for the better part of a decade?

Deacon Black is perfectly content with the status quo—work, sleep, repeat.
Who cares if he’s rigid, structured, and set in his ways?
It’s a job requirement that keeps his men safe and his company’s doors open.
One phone call is all it takes to upend his life and land him right back into a past he has tried to forget.
Revisiting old ghosts is the last thing he needs.
Especially when the forced trip down memory lane includes the only woman he never wanted to see again.

Annalise Grimaldi hit the jackpot with her life—from her trust fund to her best friend, she has it all.
But her world comes crashing to a halt when her best friend vanishes— leaving behind an apartment in tatters and more questions than answers.
There’s only one person she can think of that can help in a situation like this.
She hates to make the call, but there isn’t a thing she wouldn’t do to make sure her friend is found.
Even setting aside her hatred for Deacon Black.