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Counterfeit prescription drugs are being distributed in every American city, killing thousands. Behind this pandemic is a cartel run by mob boss Marco Vennuti. When the FBI sets up a Pharmaceutical Drug Squad of Special Agents to shut down the cartel’s operations, the members are immediately in danger as Vennuti takes drastic measures to protect the cartel from the deepening FBI probe.

Special Agent Mark Matthews is assigned to the squad and is teamed up with Special Agent Wendy Farrell to stop the cartel’s ever-tightening grip.

As if going up against the mob wasn’t intimidating enough for Matthews, the danger is amplified when Mel Tarkington, responsible for the death of Mark’s former lover, Susan Harrigan, comes out of hiding.

And he’s hell-bent on killing Mark.

In this follow-up to his bestselling crime novel Blood Money, Janssen once again delivers high drama, intensity and action.

FATAL DOSE is available from Untreed Reads.


Amazon Reviews:

5.0 out of 5 stars An Explosive Dose of Thrills March 28, 2013
By Jack King
“Fatal Dose” won’t kill you, but it will make your adrenaline shoot through the roof.
Special Agent Mark Matthews closes in on a public enemy nr 1 – a mafia boss who’s greed kills thousands across America. In a murderous race to stop the mafioso, Matthews must face his own demons, when a killer of his former lover comes on the scene, and from the hunter, the special agent becomes the hunted. Matthews’ pursuit leaves corpses that are only outnumbered by the counterfeit drugs distributed by mafia.
KJ Janssen’s thriller is a rollercoaster ride of intrigue and twists that cause heart palpitations. Take a deep breath, and enjoy the thrills of this follow up to Blood Money…

5.0 out of 5 stars Fatal Dose: It’s Addictive March 26, 2013
By Marc Simon Writer
Anyone that loves action, intrigue, murder and mayhem with a bit of hot romance thrown in–and who doesn’t–really needs to get K.J. Janssen’s Fatal Dose. Because from page one, the narrative draws you in and won’t let go. There’s a sinister plot at hand–someone’s intent on poisoning America, dose by dose, with tainted prescription drugs. It’s up to Special Agent Mark Matthews to figure out the who, what, where and how in time to put a stop the brutality. I know Mark Matthews fans will love this one as much as they loved Mr. Janssen’s first Mark Matthews mystery, Blood Money. Maybe even more. Once you pick it up, you can’t put it down.

5.0 out of 5 stars MARK MATTHEWS IS BACK- BETTER THAN EVER March 19, 2013
By Walter Manning, Jr.
K. J. Janssen has done it again. His latest novel in the Mark Matthews Mystery series has just been published.

Fatal Dose introduces a new villian . . . Marco Vennuti and his old nemisis Mel Tarkington revisits aimed at assinating Mark. It is an exciting book from cover to cover.

The novel was “ripped from the headlines” about a growing problem in Amrica with counterfeit prescription drugs.

Fatal Dose is one you don’t want to miss.

Walt Manning


Biography of Kenneth J. Janssen

Ken’s debut novel centered on the exploits of Mark Matthews, a private investigator turned FBI agent. In Blood Money Mark helps topple an association funneling money to terrorist organizations. Blood Money was published as an e-book in November, 2011. It has five-star reviews on Amazon, including one from Jack (Spywriter) King.

Hampton Manor is a multi-genre work about three generations of the Hampton
family and their interactions with five townspeople in the peaceful community of Old Brooking, Connecticut. When one of the five hires an assassin to kill Adam Hampton and his father and to burn Hampton Manor to the ground, the resulting sequence of events leaves the town of Old Brooking reeling. Hampton Manor is an emotionally suspenseful and compelling read. It was published as an e-book 4/12/2012. Hampton Manor also has five-star reviews on Amazon, including Jack King.

Secret Armageddon, Ken’s latest novel, exposes the secret battle for the consciousness of men. The battle is between Super Consciousness and the Collective Unconscious; the survival of the world being the ultimate prize. The protagonist is portrayed by Reverend Aaron Masters, minister of the New Thought Metaphysical Center. Secret Armageddon is about new ways of thinking, from birth to death.

Fatal Dose, the second Mark Matthews Mystery exposes a drug mafia distributing counterfeit prescription drugs. It was published as an ebook by Untreed Reads in March, 2013.

Ken has epublished several short stories at Nights and Weekends, Writing Raw and Long Story Short. He is a member of ITW, ASCAP.

He lives in Ohio, with his wife Jeannette and can be contacted at