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Prague Protocol: Sky Stone Psychological Thriller #3
232 pages, Kindle Edition
Published May 25, 2026
About the author
P.M. Steffen
3 books33 followersP.M. Steffen is a behavioral psychologist, artist, and author of the Sky Stone thriller series, which includes her breakout Amazon bestseller The Profiler’s Daughter.
The sequel, Killing Ulysses, is now available as an ebook on Amazon.
Before turning to writing, she specialized in behavioral treatments for aggression and violence. She lives in the Boston area with her family and splits her time between walking her dogs, writing the next great American thriller, and painting flowers, pears, and abstracts in her art studio.
Sign up for new book release updates at www.pmsteffen.com. Check out her artist website at www.pmsteffenart.com .
The sequel, Killing Ulysses, is now available as an ebook on Amazon.
Before turning to writing, she specialized in behavioral treatments for aggression and violence. She lives in the Boston area with her family and splits her time between walking her dogs, writing the next great American thriller, and painting flowers, pears, and abstracts in her art studio.
Sign up for new book release updates at www.pmsteffen.com. Check out her artist website at www.pmsteffenart.com .
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