7 Gripping Takeaways from Lost in Time by A.G. Riddle

7 gripping takeaways from Lost in Time by A.G. Riddle — a father exiled to the age of dinosaurs, a daughter’s fight to bring him home, and what time teaches us.

One morning, Dr. Sam Anderson wakes up to find the woman he loves has been murdered. He and his nineteen-year-old daughter, Adeline, are accused of the crime — and the evidence against them is ironclad.

Sam does the only thing he can do to save his daughter: he confesses. But in the future he helped build, murderers are not sent to prison. They are sent through Absolom, the machine Sam himself invented, two hundred million years into the past.

What follows is two stories braided into one: Sam fighting to survive in the age of dinosaurs, and Adeline fighting to prove him innocent in the present. Lost in Time is a thriller, a survival story, and — underneath it all — a story about a father and a daughter who refuse to lose each other.

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What the Book Is About

Lost in Time was published in September 2022 by Head of Zeus, a standalone science fiction thriller from A.G. Riddle, the bestselling author of Departure and Winter World. Its premise is the kind that hooks from the first page.

Sam Anderson is one of six scientists who invented Absolom, a machine that can send people back in time. The trip is one-way, so governments found a use for it: the world’s worst criminals are exiled through Absolom to the Late Triassic, roughly two hundred million years ago, to live out their lives alone among the dinosaurs. The threat of that exile was so terrifying that violent crime dropped to zero almost overnight.

Sam never imagined he would face that fate himself. On the third anniversary of his wife’s death, while visiting her grave with his children, he is arrested for the murder of his colleague and lover, Dr. Nora Thomas. Camera footage shows Sam and Adeline were the last people to see Nora alive.

Adeline has already lost her mother to a deadly, unfair disease. She cannot bear to lose her father as well. So while Sam wakes in a world of ferns and predators, fighting to stay alive long enough to keep a promise, Adeline sets out to prove him innocent — peeling back layers of a mystery that stretches across the past, the present, and the future, toward a revelation that changes everything.

7 Gripping Takeaways from Lost in Time by A.G. Riddle

1. A Father’s Sacrifice Is Love in Its Purest Form

Sam knows exactly what awaits him on the other side of Absolom: exile, alone, in a world that wants him dead. He walks into it anyway — because his confession is the only thing that keeps Adeline free. Lost in Time never dresses this up as heroics. It is simply what a father does when the math is terrible and the love is not negotiable.

2. The Past Is Never Really Past

Absolom was built to bury the worst of humanity in deep time, out of sight and out of mind. But the past refuses to stay buried — the same machine, the same choices, and the same secrets keep surfacing in the present. The novel’s warning is plain: we do not escape our history by sending it away. We only delay the reckoning.

3. Time Is the One Thing We Cannot Get Back

Adeline has already watched time take her mother. Now it is taking her father, one day at a time, in a place she cannot reach. That grief is the engine of the whole book. Lost in Time keeps asking the question underneath every thriller beat: if you knew how little time you had left with the people you love, what would you stop postponing?

4. The Truth Hides in the Questions We Stop Asking

The case against Sam looks closed — the footage, the timeline, the motive all line up. Adeline’s gift is that she keeps asking anyway. Each answer she finds opens two more doors, and the mystery only yields to someone willing to look foolish for asking one more question. Certainty, the book suggests, is usually just curiosity that gave up early.

5. Survival Is a Skill, Not a Gift

Stranded in the Triassic, Sam has no rescue coming and no one to impress. What keeps him alive is not strength but attention: reading the land, learning its rhythms, adapting faster than the things hunting him. Lost in Time treats survival as a discipline — small correct choices, repeated, until they add up to a life.

6. Justice Needs Patience as Much as Courage

Adeline could have screamed her father’s innocence to anyone who would listen. Instead she investigates — methodically, quietly, following evidence where it leads even when it leads somewhere uncomfortable. The novel respects that slowness. Real justice, it argues, is not won in a single brave moment; it is assembled, piece by piece, by someone who refuses to stop.

7. We Are All, in Some Way, Lost in Time

Sam is literally lost in time, two hundred million years from home. But the book’s title cuts both ways: Adeline is lost in the past she cannot change, and the rest of us lose hours to regrets and worries about futures that have not happened yet. The way back, for every one of them, is the same — stop living in the time you cannot reach, and fight for the one you are in.

Why It’s a Must-Read

Because it understands what the best science fiction knows: the technology is the doorway, but the family is the house. Lost in Time works as a propulsive thriller — a murder mystery with a twist that reframes everything — and as something warmer underneath: a story about what a parent will give up, what a daughter will endure, and how the time we spend with the people we love is the only currency that never comes back. Readers who like their sci-fi with a human heart will finish this one in a sitting.

Who This Book Is For

Fans of twisty sci-fi thrillers in the Michael Crichton tradition; readers who love dual timelines and survival stories; book clubs that enjoy arguing about impossible choices; and anyone who has ever wished for one more day with someone they lost.

It pairs well with our takeaways from Dune by Frank Herbert — another story where survival in an unforgiving world depends on reading the land, and where the choices of one generation echo for centuries.

What We Do with the Time We Have

Sam’s promise — that he will get back to his family, clear his name, and find the person who killed the woman he loved — carries him across two hundred million years. Adeline’s promise carries her through every locked door in the present. Neither of them gets more time than the rest of us. They simply refuse to waste what they have. That is the takeaway Lost in Time leaves behind after the last twist lands: the past is gone, the future is unwritten, and the only time we ever truly hold is now.