Michael C Grumley Books in Order

In the third Rollback novel, Mike Mansfield faces the full consequences of a world where almost every moment is recorded and can be reconstructed. With powerful players closing ranks around the surveillance system he helped expose, he must decide how much he is willing to risk to break their circle of control.

Mike Mansfield and his invisibles agree to help a family understand a supposedly straightforward tragedy, only to find an official story built to mislead. As they dig past the comforting narrative, Mansfield realizes he is being watched and that the truth behind the case threatens people who will gladly erase him to keep it buried.

Mike Mansfield has spent years quietly finding people no one else can, helped by a loose network of watchers he calls invisibles. When billionaire David Bruni's new supercomputer exposes the hidden trick behind Mansfield's success, the two men and an INTERPOL agent are pulled into a dangerous experiment in global surveillance and justice.

On the run after escaping the program that brought him back from death, John Reiff wakes in a battered ambulance with his altered body betraying him. Hunted by a powerful organization guarding a centuries old secret, he must uncover what was kept on ice and why his survival terrifies them.

Army veteran John Reiff dies when a bus plunges into a frozen river, then awakens in a high tech facility where doctors insist everything is fine. As his memories return, he realizes he is the first successful subject of a cryonics experiment and that the people who revived him are hiding far too much.

Armed with raw data from one of the first orbiting satellites, Joe Rickards and anthropologist Angela Reed trace a three thousand year old anomaly hidden in plain sight. As they enlist a retired NASA engineer and close in on the truth, they discover others have been quietly exploiting the same secret for years.

After years of decoding alien technology and bridging human and animal minds, Alison Shaw and John Clay face their most dangerous choice yet, as a final discovery forces three linked species to decide how far they will go to protect one another.

Investigating a baffling small plane crash in snowy Colorado, NTSB investigator Joe Rickards uncovers a decades old letter that should never have reached its recipient. Teaming up with the victim's granddaughter, he follows its trail into a web of wartime secrets with consequences for the entire world.

With the world sliding toward open conflict, Clay, Alison, and their scattered allies hold a single discovery that could pull humanity back from the brink. As governments close in, they must decide who can be trusted with a secret that could reshape the planet.

New evidence of alternate human evolutionary branches and an impossible plant with astonishing healing power send Clay and Alison to Africa. Racing rival powers and buried alien technology, they search for the source before it is weaponized or erased.

Still recovering from his earlier ordeal, Evan Nash tries to live a normal life while his visions grow stronger and more costly. Driven by a fierce sense of right and wrong, he throws himself into saving others even as his fragile health and powerful enemies close in.

A second seed vault, hidden far from the Arctic and clearly not built by humans, is uncovered and placed under Alison Shaw and John Clay's protection. Inside lie millions of alien genetic samples and the truth about why our own species evolved at all.

A year after their first breakthrough with dolphin communication, Alison Shaw's team prepares to unveil a new advance just as an experimental Russian submarine resurfaces off South America. Sent to investigate, John Clay discovers soldiers vanishing into the jungle chasing something the whole world will want.

After a bike accident leaves him with a dangerous neurological condition, eighteen year old Evan Nash begins seeing vivid scenes whenever he falls asleep. Psychiatrist Shannon Mayer doubts him until his visions start matching details from her kidnapped daughter's case and they must decide how much risk to demand of him.

Naval investigator John Clay follows a crippled submarine's strange failure to a Caribbean research lab where Alison Shaw is on the verge of true two way communication with dolphins. When the animals reveal a buried object no one can explain, they race to prevent a disaster spanning ocean and ice.

A six year old girl named Sarah can see things no one else can, a talent that makes her the target of people who want to use or destroy her. When inexperienced social worker Christine Rose takes Sarah into her care, she stumbles into a centuries old battle and must fight to keep the child alive.