In All Due Heist by K. Sterling

Who doesn’t love a good heist? Especially when it involves the FBI and a legendary Irish gangster. Speed has presented his new neighbors with an opportunity that’s too good to pass up but Lavender knows there’s a catch. The immaculate assassin is convinced that Speed’s past holds a clue that could have terrible consequences so he sets out to learn how this particular lost boy made his way to Lake Cliff.
He’s spent his entire life waiting to make his move and love was never part of the plan. But Speed’s determined to have it all and give Blake everything. Love and romance are a lot more complicated than planning a heist or a hit, though. For the first time in his life, Speed is out of his element and he’s just about out of secrets. Can he get his revenge and keep Blake or is Speed about to run out of luck?