Time Odessey is "losely" related to Space Odessey
The story is based on Clarke's previous Space Odyssey novel series. 
Clarke describes the premise as "neither a prequel nor a sequel" to Space Odyssey, but an "orthoquel"
In the Time Odyssey series, not-so-benevolent godlike aliens start an endless mission to regulate the development of sentient life throughout the known universe, in order to prevent all other species from harnessing too much of its energy, which would only accelerate the inevitable heat death of the universe. 



Book 1 Time's Eye
For eons, Earth has been under observation by the Firstborn, beings almost as old as the universe itself. The Firstborn are unknown to humankind until they act. In an instant, Earth is carved up and reassembled like a huge jigsaw puzzle. Suddenly the planet and every living thing on it no longer exist in a single timeline. Instead, the world becomes a patchwork of eras, from prehistory to 2037, each with its own indigenous inhabitants.

Scattered across the planet are floating silver orbs impervious to all weapons and impossible to communicate with. Are these technologically advanced devices responsible for creating and sustaining the rifts in time? Are they cameras through which inscrutable alien eyes are watching? Or are they something stranger and more terrifying still?

The answer may lie in the ancient city of Babylon, where two groups of refugees from 2037 three cosmonauts returning to Earth from the International Space Station, and three United Nations peacekeepers on a mission in Afghanistan have detected radio signals: the only such signals on the planet, apart from their own. The peacekeepers find allies in nineteenth-century British troops and in the armies of Alexander the Great. The astronauts, crash-landed in the steppes of Asia, join forces with the Mongol horde led by Genghis Khan. The two sides set out for Babylon, each determined to win the race for knowledge . . . and the power that lies within.

Yet the real power is beyond human control, perhaps even human understanding. As two great armies face off before the gates of Babylon, it watches, waiting. . .


Book 2 Sunstorm
Returned to the Earth of 2037 by the mysterious and powerful Firstborn, Bisesa Dutt is haunted by memories of her five years spent on the strange alternate Earth called Mir, a jigsaw-puzzle world made up of lands and people cut out of different eras of Earth’s history. Why did the Firstborn create Mir? Why was Bisesa taken there and then brought back just a day after her disappearance?

Bisesa’s questions are answered when scientists discover an unnatural anomaly in the sun’s core—evidence of alien intervention more than two thousand years ago. Now plans set in motion by inscrutable observers light-years away are coming to fruition in a sunstorm designed to eradicate all life on Earth in a bombardment of radiation. As the apocalypse looms, religious and political differences on Earth threaten to undermine every countereffort. And all the while, the Firstborn are watching. . .


Book 3 First Born
The Firstborn-the mysterious race of aliens who first became known to science fiction fans as the builders of the iconic black monolith in 2001: A Space Odyssey-have inhabited legendary master of science fiction Sir Arthur C. Clarke's writing for decades. With Time's Eye and Sunstorm, the first two books in their acclaimed Time Odyssey series, Clarke and his brilliant co-author Stephen Baxter imagined a near-future in which the Firstborn seek to stop the advance of human civilization by employing a technology indistinguishable from magic. Their first act was the Discontinuity, in which Earth was carved into sections from different eras of history, restitched into a patchwork world, and renamed Mir. Mir's inhabitants included such notables as Alexander the Great, Genghis Khan, and United Nations peacekeeper Bisesa Dutt. For reasons unknown to her, Bisesa entered into communication with an alien artifact of inscrutable purpose and godlike power-a power that eventually returned her to Earth. There, she played an instrumental role in humanity's race against time to stop a doomsday event: a massive solar storm triggered by the alien Firstborn designed to eradicate all life from the planet. That fate was averted at an inconceivable price. Now, twenty-seven years later, the Firstborn are back. This time, they are pulling no punches: They have sent a quantum bomb. Speeding toward Earth, it is a device that human scientists can barely comprehend, that cannot be stopped or destroyed-and one that will obliterate Earth. Bisesa's desperate quest for answers sends her first to Mars and then to Mir, which is itself threatened with extinction. The end seems inevitable. But as shockingnew insights emerge into the nature of the Firstborn and their chilling plans for mankind, an unexpected ally appears from light-years away.