Orson Scott Card's The Last Shadow is the long-awaited conclusion to
both the original Ender series and the Ender's Shadow series, as the
children of Ender and Bean solve the great problem of the Ender
Universe--the deadly virus they call the descolada, which is incurable
and will kill all of humanity if it is allowed to escape from
Lusitania.
One planet.
Three sapient species living peacefully together.
And one deadly virus that could wipe out every world in the Starways
Congress, killing billions.
Is the only answer another great Xenocide?