Sixty-six million years ago, dinosaurs didn't go extinct. They fled.
On Theia, Earth's hidden sister planet, they evolved into Saurs: a civilization centered around science, hierarchy, and genetic perfection. Humans are nothing more than an ancient threat-one the Saurs believe they left behind forever.
Until Filo.
For as long as he can remember, Filo-a human teenager-has lived in the shadows of Theia with Mai, the Saur who rescued him from the wreckage of an Earth shuttle as an infant. But when the life she built to protect his impossible existence is torn apart, he's forced to run.
Aboard an autonomous spacecraft with unexpected allies, he follows a trail of encrypted clues to a dangerous place: Earth. What he finds there is more than the truth of his origins-it is a fierce girl, an egomaniac genius, and the twisted link between them.
The farther he travels, the closer he comes to uncovering what he truly is and just how much Mai sacrificed to save him. With two worlds closing in, Filo must decide how far he is willing to go for the only one in the universe who ever chose him.
Saur fuses the found-family heart and humor of Guardians of the Galaxy with the prehistoric intrigue of Jurassic Park, delivering a YA sci-fi adventure layered with mystery, survival, and high-stakes discovery.
