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Final Kill
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10 June 2025

One final kill and then a well-earned break. But when the world's deadliest female assassin can't hit the mark, she may be vacationing six feet under...
Acid Vanilla is one trigger-pull away from a hard-earned vacation when her boss demands she take out a notorious Paris-based hacker. But when her eccentric female target reveals shocking truths about Vanilla’s past, the assassin does the unthinkable — she lets her mark live.
Now caught in a dangerous love/hate relationship with the woman she couldn't kill and with bounties on both their heads, Acid's only escape from the game is to disappear for good. But with elite killers closing in from every angle, she’ll need every brutal trick in her playbook just to survive.
From assassin to protector in the blink of an eye…
A female John Wick with a wit as sharp as her fists. Final Kill kicks off the Acid Vanilla series—packed with high-stakes action, unforgettable characters, and relentless suspense. Buckle up, it's going to be one lethal ride!
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Praise for the Acid Vanilla series:
★★★★★ Bold, Bolshy and Brilliant!
★★★★★ Plots and inner plots kept me glued to my Kindle.
★★★★★ Grabs you in the first chapter and doesn’t let go until the last page.
★★★★★ Superb characters and a great plot cleverly written.
★★★★★ …fast paced … keeps you rushing to turn pages.
★★★★★ …a non-stop rolling plot that defies rational thinking.
★★★★★ Great thriller with a fantastic action heroine.
★★★★★ Acid Vanilla is a serial adrenalin rush. Kept me turning the pages.
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Final Kill was formerly published as Acid Vanilla
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Matthew Hattersley grew up in Yorkshire, UK, where he mastered the arts of loud music, dramatic exits, and impossible plot twists. Over the past two decades, he's toured Europe in a band, trained as a professional actor, and founded a theatre and media company — all ideal prep for crafting thrilling page-turners. Now, he writes adrenaline-fuelled thrillers and crime novels. His bestselling Acid Vanilla series follows a wily yet flawed assassin teetering on the brink of an existential crisis who, between high-stakes escapades and calculated revenge, realises that redemption is also a killer's pursuit. Matthew lives in Derbyshire with his wife and daughter, who keep him on his toes — and grounded in reality.