
About the Book
Synopsis
Mind Vault – A Science Fiction Thriller
In the distant future, Noah Martin’s ordinary life as a bartender on the American Space Elevator, Thalum, is shattered when he discovers he possesses powerful psi abilities—and the key to unlocking a secret buried deep within his Mind Vault. Hunted by corporations, military factions, and rogue operatives, Noah must navigate a world of interstellar espionage, telepathic warfare, and high-stakes intrigue. With the help of a rogue team of operatives, he must uncover the truth behind Dr. Ortega’s Shard Vault on Mars before those seeking to control him seize ultimate power.
Blending cyberpunk aesthetics, corporate conspiracies, and psychic abilities, Mind Vault is a gripping sci-fi thriller perfect for fans of Altered Carbon and The Expanse.
March 2025
Cover Design and Illustrations by Tom Edwards
Illustration © Tom Edwards, TomEdwardsDesign.com

Explore Authors Magazine Editorial Review
Noah Martin was a normal man with an average life. He lived in an apartment with three roommates, loved his parents, and worked a decent job at The Socca Bar and Lounge as the bartender, where he faced the typical issues that come with the job, like a lecherous and vindictive boss and skeevy patrons.
However, things take a turn for the chaotic at the bar after he locks eyes with a mysterious woman…
Philosopher, yoga instructor, and religious teacher Swami Satchidananda Saraswati once said, “When you become the master of your mind, you are master of everything...” and while the journey has just begun for protagonist Noah Martin, this quote proves nonetheless true in the first entry of Ray Clifford Martinez II’s series Echoes of the Hapnu: Mind Vault
The story's rich world-building was seamlessly woven through Noah’s perspective, allowing us to get a sense of his character how this future landscape and plot works.
Mind Vault's unique magic system, PSI (which gives the characters abilities like telepathy or memory reading), is one of the most intriguing aspects of the plot. I felt that this innate ability was cleverly juxtaposed against the backdrop of the story's advanced technology. Martinez explores a fascinating dynamic where advancements that are meant to elevate humanity, inadvertently hinders the innate abilities of certain individuals...a conflict rarely seen in this genre. The pervasive network infrastructure seems to disrupt the flow of psychic energy, creating compelling challenges for those who wield it. Despite access to technology that can extend the lives of the characters, whenever one of them is grievously injured or worse, the gravity of that situation remains present and never lessened.
The way the characters use their innate abilities throughout the novel is exciting and innovative in ways not often seen in this genre. Action scenes can typically be very messy to imagine but Martinez's narration, written in crisp prose, flows naturally without becoming overly verbose. Characterization however, is Mind Vault's greatest strengths. The author is great at establishing the characters and their motivations while maintaining a strong element of suspense and mystery. Noah Martin is a great audience surrogate character to have in this type of sci-fi adventure. He’s knowledgeable enough about the world around him for world-building purposes, but can maintains an air of vulnerability when he is caught off-guard or surprised.
Martinez masterfully gives each character their own unique voice in ways that never bleeds into each other's, even with the presence of mind-warping abilities.
With its strong writing, likable characters, engaging plot, impressive world-building, great mind-melting abilities, and beautiful illustrations throughout, Echoes of the Hapnu: Mind Vault leaves a great impression and a strong start to a new series, earning a Neuro-shard enhanced recommendation from me. ★★★★★ – Elijah B. (Explore Authors Magazine)

When Noah saw the news announcing the death of Dr. Martha Ortega, the leading authority on Black Plague research, he was unaware that her death would upend his life. The year is 6992, and, as it turns out, aliens are not so bad. Although humans were already a multi-planetary species having an average lifespan of a hundred years, the Hapnu's gift of sharding revolutionized human technology. The Hapnu are a friendly alien race whose sharding technology allows a person to avoid death by transferring their consciousness to a clone. But sharding tech is imperfect. It allows three mind transfers before its flaw—the Black Plague—shows up to deliver irreversible death. Dr. Ortega's assassination means that humanity's one shot at immortality has disappeared. Except the cure is another one of the Hapnu's gifts, and the key to unlocking it has been transferred to Noah. Who is Noah, and what other gifts might the Hapnu have for humanity? Read Mind Vault by Ray Clifford Martinez II to find out.
Mind Vault is the expertly crafted first book in the Echoes of the Hapnu series, and I already cannot wait for the next book. It is suspenseful, with excellent world-building, plot, and character development. The story features futuristic elements ranging from asteroid mining to space elevators and holographic adverts. The use of italics to represent thoughts and telepathic dialogue also made reading seamless. Unlike many sci-fi novels today, Mind Vault portrays an imperfect society with enough positivity to prevent the plot from having a dystopian theme. As a science fiction fan who hadn't read any sci-fi in months, the story met my expectations and is an excellent choice for readers trying the genre for the first time. What else can I say? If you want to explore the world of scientific imagination, then Ray Clifford Martinez's Mind Vault is the book to read. Reviewed by Joshua Olokodana for Readers’ Favorite