Michael C. Grumley has 8 audiobooks on Listento.it, narrated by 3 narrators, with an average listener rating of 4.8★ across 28 ratings. The most-rated is Ripple.
Ripple
Summary
It began in Ethiopia, hundreds of thousands of years ago, when a handful of genetic mutations caused evolution to split from the primates and mankind was born. Now, eons later, evidence of more splits from the apes is being unearthed. And with them, a disturbing realization. Ours was only one of many. And yet we survived. But it was not by luck or chance. We survived because humans had something the others did not. A unique ingredient that has only now been rediscovered. First in the mountains of South America, where it was promptly destroyed by the Chinese. And now, a second source in Africa, the epicenter of mankind's very inception. A place that John Clay and Alison Shaw must find quickly. Because the Russians already know what we are searching for. And the Chinese want back what is rightfully theirs. The mother of all secrets awaits the world in Africa. One that will not only explain who we are, but will decipher the very code within our own DNA.
©2019 Michael C. Grumley (P)2019 Recorded Books
Leap
Summary
It was one of the greatest breakthroughs in human history. An achievement that stunned the entire world. And it was only the beginning. Facing the cold, clear glass, Alison Shaw stared nervously into the giant seawater tank. It was just one year ago that she and her team of marine biologists had stunned the world with their incredible breakthrough. And now, they were about to do it again. But an ocean away, something strange was unfolding. Along a lonely coast in South America, an experimental Russian submarine, long thought to have been dismantled, has suddenly resurfaced. And the US Navy has taken notice, sending Officers John Clay and Steve Caesare to investigate. The sub has been studying a group of unmarked soldiers. Disappearing into the jungle each night beneath the cover of darkness. Something has been discovered...something big. And it's about to fall into the wrong hands. Unless Alison Shaw and her team can find something that no one else can.
©2014 Michael C. Grumley (P)2018 Recorded Books
Breakthrough
Summary
One of the greatest breakthroughs in human history. A secret that was never supposed to be found. And a crisis that cannot be stopped. Deep in the Caribbean Sea, a nuclear submarine is forced to suddenly abort its mission under mysterious circumstances. Strange facts begin to emerge that lead naval investigator John Clay to a small group of marine biologists who are quietly on the verge of making history. With the help of a powerful computer system, Alison Shaw and her team are preparing to translate the first two-way conversation with the planet's second smartest species. But the team discovers much more from their dolphins than they ever expected when a secret object is revealed on the ocean floor. One that was never supposed to be found. Alison was sure she would never trust the military again. However, when an unknown group immediately becomes interested in her work, Alison realizes John Clay may be the only person she can trust. Together, they must piece together a dangerous puzzle, and the most frightening piece is the trembling in Antarctica. To make matters worse, someone from the inside is trying to stop them. Now, time is running out...and our understanding of the world is about to change forever.
©2013 Michael C. Grumley (P)2018 Recorded Books
Mosaic
Summary
Political and social infighting threaten to destroy the world. Rancor and hatred only grow stronger, engulfing entire nations. And each day moral and economic strife brings embroiled countries ever closer to war. But hope is not dead. Everywhere, pockets of honor and compassion continue to persevere. Where human lives are cherished and valor endures. And one small, extraordinary group fights to save us all. A team in possession of the mother of all secrets. The one secret - the one discovery - that could bring the world back from the brink.
©2019 Michael C. Grumley (P)2019 Recorded Books
The Last Monument
Summary
One small handwritten letter, sent from a dark, remote corner of the planet and lost in the system for 60 years, is about to change the entire human race. Outside Denver, Colorado, Joe Rickards stands over a small aircraft wreckage, studying burnt remains still smoldering in a field of freshly fallen snow. He's an investigator for the NTSB, working to carefully roll back the last several hours and identify the cause of the accident. But this time, he can't. The details behind this tragedy don't add up. Unlike every other investigation of Joe's career, the facts make no sense. Each new piece of information only makes the accident more mysterious, and more baffling. Why would a person receive an age-old letter and suddenly disappear into the thick of night...paying to be flown out of a closed airport in the worst possible weather conditions by a pilot who hadn't had his hand on the stick in years? With the only surviving relative insisting her grandfather would never have climbed into a small airplane in the first place, even in perfect weather. A bizarre string of events culminating in a horrible accident unlike anything Rickards has experienced. Leaving his only hope at understanding it in the hands of the victim's sole remaining relative. Beginning with how a mysterious letter could turn up after being lost in the system for 60 years. Sent by someone who should have already been long-dead. A single letter Joe Rickards is about to discover, with a secret that will change the entire world.
©2020 Michael C. Grumley (P)2020 Michael C. Grumley
Catalyst
Summary
In 1984, a doomsday vault was constructed on a remote island in the Arctic Ocean. Its purpose was to preserve Earth's genetic history in the event of a global catastrophe. Now, decades later, a second vault has been uncovered, this one resting where no one ever expected. And the problem is it's not ours. Yet even more curious than the vault itself is what lies inside. Seeds. Millions of seeds. Each with a genetic embryo untouched and perfectly preserved. Waiting. No one knows who built it. Or when. What we have managed to figure out is that whoever it was traveled an immense distance. For the sole purpose of hiding their genetic blueprints on Earth. But why? Now, a small group of marine biologists and navy investigators have been assigned to find out. Before anyone else does. But Alison Shaw and John Clay are not prepared for what they are about to uncover. Beginning with the truth behind our own evolution.
©2016 Michael C. Grumley (P)2018 Recorded Books
Through the Fog
Summary
Two weeks after his 18th birthday, everything changes for Evan Nash. When he injures his head after being run down on his bicycle, he begins having strange, harrowing visions whenever he tries to sleep. He turns to psychiatrist Shannon Mayer for help. Mayer has troubles of her own: her daughter has been kidnapped, and she's desperate for answers. Though she's at first skeptical of Evan's accounts, it quickly becomes clear that his mysterious ailment may be the key to finding her child. Soon Evan's visions prove essential to the case but at a terrible cost. Evan and Shannon face an agonizing decision: Should he risk himself to save the girl?
©2015 Michael C. Grumley (P)2014 Brilliance Audio, all rights reserved.
Amid the Shadows
Summary
One of the most stunning abilities ever seen...has just been born into the eyes of a six-year-old girl. For one very special reason. Something is about to happen. Something unstoppable, and something terrible. An event that can do more than just change human history. But mankind has a secret. A little girl named Sarah. Afraid and alone, and under the care of an inexperienced social worker. A young woman about to discover that she will do anything to keep Sarah alive. Because there is much more to Sarah than meets the eye. Note to listener: Similar to books by Dan Brown and James Rollins, this story contains a strong religious undertone.
©2013 Michael C. Grumley (P)2015 Podium Publishing