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Sentinel: Space Opera Adventure
A colossal spacecraft adrift and abandoned. Is it the answer to a mystery, or the gateway to oblivion?
The enigmatic vessel may hold the key to Captain Jack Grady’s frantic search. But the boarding party he leads to investigate the derelict soon runs into trouble. When he is plunged into another dimension, he finds himself in a desperate struggle to survive.
Battling against homicidal bots and carnivorous creatures, he fears he faces a gruesome death and worries about the fate of his crew. Marooned without a way back to his ship, he has never felt so alone in his life.
Can Grady discover how to return to his own reality, or is he doomed to meet his end in a hostile world far from home?
Sentinel is book two in Adrian Murphy’s clean, fast-paced space opera series, Galaxy Flux. Perfect for sci-fi adventure/exploration fans who’ll enjoy discovering unknown galaxies with a snarky spacecraft's AI, a tenacious captain haunted by grief and remorse, and a gung-ho weapons operator who loves blowing things up.
Grab Sentinel and journey to uncharted galaxies today!
The enigmatic vessel may hold the key to Captain Jack Grady’s frantic search. But the boarding party he leads to investigate the derelict soon runs into trouble. When he is plunged into another dimension, he finds himself in a desperate struggle to survive.
Battling against homicidal bots and carnivorous creatures, he fears he faces a gruesome death and worries about the fate of his crew. Marooned without a way back to his ship, he has never felt so alone in his life.
Can Grady discover how to return to his own reality, or is he doomed to meet his end in a hostile world far from home?
Sentinel is book two in Adrian Murphy’s clean, fast-paced space opera series, Galaxy Flux. Perfect for sci-fi adventure/exploration fans who’ll enjoy discovering unknown galaxies with a snarky spacecraft's AI, a tenacious captain haunted by grief and remorse, and a gung-ho weapons operator who loves blowing things up.
Grab Sentinel and journey to uncharted galaxies today!
Audible Audio
Published January 26, 2026
About the author
Adrian Murphy
16 books19 followersAdrian writes fast-paced fantasy adventure and sci-fi novels. His characters are diverse and relatable, battling impossible odds and dark deeds in a desperate battle for survival.
He traces his love of storytelling to growing up in Ireland, where castles and history abound. Today, he makes his home close to the beautiful shores of Lake Huron, Ontario, Canada, along with his adorable cat, Mr. G.
Favorite authors include Martha Wells, Lindsay Buroker, Adrian Tchaikovsky, J. R. R. Tolkien, and Terry Pratchett.
Learn more at: adrianmurphybooks.com
He traces his love of storytelling to growing up in Ireland, where castles and history abound. Today, he makes his home close to the beautiful shores of Lake Huron, Ontario, Canada, along with his adorable cat, Mr. G.
Favorite authors include Martha Wells, Lindsay Buroker, Adrian Tchaikovsky, J. R. R. Tolkien, and Terry Pratchett.
Learn more at: adrianmurphybooks.com
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