It began in 1997 with the debut and award-winning novel - Killing Floor.
Since then, Lee Child has written more than 20 novels, selling more than 100 million copies around the world.
And now, the Jack Reacher author’s in the middle of passing the baton on to his younger brother, Andrew.
The pair are now releasing their second book together, Better Off Dead.
And Lee is set to fully pass the series on in another book or two.
Andrew and Lee Child joined Mike Hosking
LISTEN ABOVE