The book I read is called Xenocide by Orson Scott Card. This book is the third in
a quartet that chronicles the life of a man called Ender and his sister Valentine. In this
book, both Ender and Valentine are over 3000 years old thanks to faster-than-light-travel
and Einstein's theory of relativity. Ender is known through out the universe as Ender the
Xenocide for destroying the Bugger race 3000 years earlier. His sister Valentine is
equally famous for her writings under the name Demonsthes. Both are assumed dead for
more than obvious reasons. Though soon enough a world in trouble will find out the truth
and learn that they are more than lucky these two extraordinary people are still alive to
help them through possible annihilation.
The book begins with Ender all ready on Lusitania and married to the most
prominent scientist there. Valentine is on a distant planet also married and with kids
when she finds out that Ender needs her to help and she must come to Lusitania right
away. Now this would have to be a most serious problem to uproot a family from there
home and travel to a distant world, wasting years through the theory of relativity and
close to light speed travel. And it is a very serious problem. Lusitania is a new colony
planet that contains the only other sentient life forms every found by humans. The other
being the Buggers, though they were destroyed 3000 years before. Therefore strict rules
were placed upon the colonist not to associate with these life forms. They broke these
laws. This was not the largest threat though. The problem was that the sentient life forms
contain a virus in their genetic code that is deadly to all humans who come in contact
with it. Even worse, there is no cure. Therefore, Starways Congress has decided to
destroy the entire planet with the Dr. D device. This device is a molecular disrupter.
Therefore, Valentine leaves right a...