David Brin 
Uplift War [EPUB ebook] 

As galactic armadas clash in quest of the ancient fleet of the Progenitors, a brutal alien race seizes the dying planet of Garth. The various uplifted inhabitants must battle their overlords of face ultimate extinction. At stake is the existence of Terran society and Earth and the fate of the entire Five Galaxies.THE UPLIFT WAR is the third book in David Brin’s magnificent Uplift series. Winner of the Hugo award when it was first published, it is a sweeping, brilliantly crafted story of adventure and wonder from one of the greatest writers of science fiction.