Ryan Rule by Sadie Kincaid

Jessie Heaton is a fearless, flame-haired computer hacker. Independent and feisty, she’s relied on no-one but herself since the age of sixteen.
Working for the Russians, she is finally close to getting the one thing she wants most in life, when she’s stopped in her tracks by the notorious Ryan brothers.
The Ryans are Irish Mafia. They are unstoppable. No-one stands in their way. And nothing comes between a Ryan and his family.
That is, until the hurricane that is Jessie, crashes into their lives. With a world full of secrets and a past that she can’t outrun, will she be their salvation or their downfall?