"Unrelenting thriller.  Absolute Authenticity on Every Page."

--Publishers Weekly.

"A Fine Apocalyptic Thriller.  Right up the alley of Clancy fans."


"I Love it!  You Can Not Put it Down!"

--Judge Jeanine Pirro, Fox News Channel

"Epic in scale, yet swiftly paced.  First rate."

--Col. Ralph Peters, New York Times Bestseller

Visit our brand new Without Mercy

 website at www.withoutmercy.org

And Don't Forget to Look at R.J.'s Last Novel, The Fall

R.J. PINEIRO is the author of many internationally acclaimed novels including Shutdown, Firewall, Cyberterror, and Havoc, and The Fall.  His new novel is Without Mercy. 

​"This alternate world sic-fi thriller is packed with high stakes and moves at a high speed."

The Wall Street Journal

Science Fiction Book Club

​"Packed with mystery, intrigue, physics, fight scenes, and a bit romance, this story felt like a cross between a Lee Child thriller and hard science fiction."

When ISIS detonates nuclear weapons in two key American strongholds, the United States plunges into chaos and the CIA scrambles to prevent a third tragedy in Without Mercy, a terrifying and topical thriller by Col. David Hunt and R.J. Pineiro.

In Development as a TV Series

​"A first-rate thriller delivered by a seasoned pro.  Last year had Andy Weir's The Martian; this year's clear torch-bearer is Pineiro's The Fall."

Open Letters Monthly

In The Fall, a man jumps from the upper-most reaches of the atmosphere and vanishes, ending up on an alternate Earth where he died five years earlier.

R.J. Pineiro

​"It's a thrill-a-minute story, with good hear-and-now technology, and a striking scientific premise at its heart."

Kirkus Reviews