"...the combination of an incredibly original narrative of a man striving to reach his potential and brilliant storytelling captivated even my stuffy literary attention.... Rather than being a great 'Christian novel,' Relentless is a great novel by a very talented Christian writer."
—HollywoodJesus.com
"Parrish writes with the verve and attitude of a New York City cab driver, plunging ahead with barely a glance at oncoming traffic, slinging you from side to side with near misses and narrow escapes before delivering you, safe, to your destination."
—Bookpage
"All the elements of a great thriller are in place: characters you root for, crisis of epic proportions that require larger than life answers, and questions that keep the pages turning late into the night."
—ChristianReviewofBooks.com
"Author Robin Parrish smartly provides more than just spine-tingling action, intricately weaving his tale around the universal questions of truth and purpose."
—Matt Bronleewe