I'm looking for a book I've read couple years ago. The plot was similar to "A Sound of Thunder" and Time Safari.

In rough sketches the plot is as follows:

A group of rich people embark on safari trip via time machine. Among them there is one hunter guy and a certain woman. Can't remember the details about her, only that at first they don't like each other and it's them at the end in that restaurant on a date.

They do safari stuff, which is starting to getting out of hand. Maybe in the middle of the story author somehow hints that dinosaurs may be invisible. In the climax there is a large fight between the humans and dinosaurs. Probably lesser creatures are influenced by those invisible ones. Humans somehow win, though one might be dead, and return to their times.

Sometime later, said hunter guy meets that woman in the restaurant. They're having a date. I think it was she, who gave him a gun. It might have been a revolver, maybe with special bullets. Then more than one dinosaur, I think, makes itself visible and attacks the couple. They fight back. I don't remember what was next.

Those dinosaurs were sentient enough to be looking for members of the original group and to have some sort of control over lesser dinosaurs.

2 Answers 2


I finally tracked it down. The book I was after is by Miroslav Zamboch and titled Predators (Predátoři); it was published in 2007. Summary from the link and translated courtesy of my browser so there may be mistakes.

People have long ruled their planet and want more, to control the universe - and time. The opportunity to look back in the past is so appealing - to see the world about a hundred million years ago. World of native continents, a world of the greatest predators that ever lived on Earth. Travelers do not know, however, that they are going somewhere where they do not belong. In space and time, where they encounter something they can not even handle their most modern weapons. Where there is something that can kill us all.

I recognize the cover.

_Predátoři_ front cover

  • 2
    I found, translated and edited in a summary of the book but there may be some mistakes in the translation so be wary.
    – TheLethalCarrot
    Nov 21, 2018 at 15:32
  • It would be nice to find that piece of plot from the final scene.
    – Mike
    Nov 21, 2018 at 15:55

I am not convinced it is the answer, but The Dinosaur Four by Geoff Jones ticks off some of the boxes. It involves people transported back to dinosaur times, and the experiment which transfers them back is associated with invisibility. That said, I haven't found any mention of the dinosaurs themselves being invisible, although a diagram by the author explaining the end does indicate that a T-Rex comes back with them. Another point against it, it doesn't sound like the dinosaurs are sentient.

Cover image of *The Dinosaur Four*

They came for the coffee and wound up in the Cretaceous.

A ticking sound fills the air as Tim MacGregor enters The Daily Edition Café, hoping to meet his new girlfriend for coffee. Moments later, a chunk of building is transported 67 million years back in time, along with everyone inside.

Ten unlikely companions find themselves in a world of dinosaurs and prehistoric reptiles. Several survivors compete for leadership as they search for a way home, and one member of the group plots to keep them all trapped in the past...

  • Thanks but that's not it. Certainly there wasn't any '20min failsafe option'. I don't know why so many variations exists.
    – Mike
    Sep 20, 2018 at 17:20
  • 1
    @Mike - Mostly because it's easier to write a variation on a great idea someone else had ("Sound of Thunder") than to come up with a brand-new, unique, great idea.
    – RDFozz
    Sep 20, 2018 at 22:36

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