Jack's Righteous Revenge Box Set

A four book box set where revenge is the theme, including:
Burning Fire, where ex-army officer Jack takes his revenge on a couple of flirts who play the wrong game with the wrong man.
Beware Macduff, where a callous tackle on the rugby field costs Macbeth more than a broken leg.
The Rogue Avenger, where disgraced MI5 agent Scott takes the law into his own hands with a couple of terrorists.
Revenge of the Vorinovs, where a seven year wait makes revenge all the sweeter for Alexi and Evgeny.