My Brother's Keeper — Jassy Mackenzie

Arriving at a highway accident scene on a stormy night, Joburg paramedic Nick Kenyon finds only one victim: a critically injured young woman in the car's passenger seat. In the ambulance, Nick agrees to take her phone and make an urgent call for her. What he doesn't know is that the missing driver is part of a cold-blooded gang of robbers planning their biggest-ever heist. And that his actions have just made him a target.
As an ex-mercenary with a dubious past, Nick not only knows how to save lives, but to take them as well. He will be needing both these skills, because his past is back with a vengeance. His brother Paul is the gang leader and has an old score to settle. Nick helped put Paul in prison once before, and Paul has vowed it will never happen again.
The countdown to the heist begins, and two brothers are pitted against each other once more in a deadly battle where there can be only one survivor.