Card, Orson Scott. Formic Wars. #3

Title from web page

When the alien ship screamed through the solar system, it disrupted communications between the far-flung human mining ships and supply stations and between them and Earth. So Earth and Luna were unaware that they had been invaded until the ship pulled into Earth orbit, and began landing terra-forming crews in China. Politics and pride slowed the response on Earth, and on Luna, corporate power struggles seemed more urgent than distant deaths. If Earth doesn't wake up the planet could be lost

Compact disc

Unabridged

Read by Stefan Rudnicki and a full cast