From audible.com:

Adrian Tchaikovksy's critically acclaimed stand-alone novel Children of Time is the epic story of humanity's battle for survival on a terraformed planet.

Who will inherit this new Earth?

The last remnants of the human race left a dying Earth, desperate to find a new home among the stars. Following in the footsteps of their ancestors, they discover the greatest treasure of the past age - a world terraformed and prepared for human life.

But all is not right in this new Eden. In the long years since the planet was abandoned, the work of its architects has borne disastrous fruit. The planet is not waiting for them pristine and unoccupied. New masters have turned it from a refuge into mankind's worst nightmare.

Now two civilizations are on a collision course, both testing the boundaries of what they will do to survive. As the fate of humanity hangs in the balance, who are the true heirs of this new Earth?

From audible.com:

The astonishing sequel to Children of Time, the award-winning novel of humanity's battle for survival on a terraformed planet.

Thousands of years ago, Earth's terraforming program took to the stars. On the world they called Nod, scientists discovered alien life - but it was their mission to overwrite it with the memory of Earth. Then humanity's great empire fell, and the program's decisions were lost to time.

Aeons later, humanity and its new spider allies detected fragmentary radio signals between the stars. They dispatched an exploration vessel, hoping to find cousins from old Earth.

But those ancient terraformers woke something on Nod better left undisturbed.

And it's been waiting for them.

For more from Adrian Tchaikovsky, check out:
Children of Time

From audible.com:

The modern classic of space opera that began with Children of Time continues in this extraordinary novel of humanity's battle for survival on a terraformed planet.

Earth failed. In a desperate bid to escape, the spaceship Enkidu and its captain, Heorest Holt, carried its precious human cargo to a potential new paradise. Generations later, this fragile colony has managed to survive, eking out a hardy existence. Yet life is tough, and much technological knowledge has been lost.

Then strangers appear. They possess unparalleled knowledge and thrilling technology–and they've arrived from another world to help humanity’s colonies. But not all is as it seems, and the price of the strangers' help may be the colony itself.

Children of Memory by Arthur C. Clarke Award-winning author Adrian Tchaikovsky is a far-reaching space opera spanning generations, species and galaxies.