The cover and synopsis for Earth Afire, the second novel in the First Formic War series, co-authored by Orson Scott Card and Aaron Johnston has been revealed. I was completely drawn in by Earth Unaware (reviewed here) and can't wait for this one to be released.
WARNING: If you haven't read Earth Unaware yet, you might want to skip the synopsis below since it contains some spoilers.
Release date - June 2013
Pre-order from The Book Depository
100 years before Ender's Game, the aliens arrived on Earth with fire and death. This is the story of the First Formic War.
Victor Delgado beat the alien ship to Earth, but just barely. Not soon enough to convince skeptical governments that there was a threat. They didn’t believe that until space stations and ships and colonies went up in sudden flame.
And when that happened, only Mazer Rackham and the Mobile Operations Police could move fast enough to meet the threat.