Sunstorm (Time Odyssey #02)

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. . . .