The With Time to Kill series by Frank Ferrari

Garry Plumb is given a gift that defies reality: a Carrier, capable of sending its holder back through time. He uses it to rewrite his own past – but as the line between justice and vengeance blurs, and the true price of the life he desires becomes clear, he must ask himself: is it worth paying? DCI John Waters is hell-bent on keeping Scotland’s streets clean, but sometimes the law fails. That’s where Garry steps in, hunting those who deserve to be hunted — the ones Waters can only watch escape. Every trip back costs Garry something, and every kill carries him further from the man he is trying so desperately to be. Waters finds himself torn between everything he’s sworn to uphold and the one man capable of delivering what he can’t: true justice. He knows what Garry is. He keeps coming back to him anyway. With Time to Kill. The Dying of the Light. The Last Trip for Good. Three impossible investigations. Two men trying to do good. One ending you won’t see coming.