Hungry for the Wolf by Kate Rudolph

Bryan has one job: keep Kerry safe.
When Bryan’s assigned to guard Kerry before she testifies in a high profile case, he expects it to be a simple job. Falling for her is against every rule, but no shifter can deny the mate bond.
Kerry Delgado is anything but simple.
When the bullets and fur start flying, Bryan discovers that he and Kerry have far more in common than he imagined. His wolf demands he does everything possible to keep her safe, but she’s tangled up with dangerous men. And she may hold the key to the mystery of his pack’s existence.
He’s supposed to be a regular bodyguard, even if he’s a werewolf. But when there’s magic involved, nothing is simple. And if Bryan wants to claim Kerry as his own, he’ll need to unravel the mystery before it’s too late and he loses everything