Title: "A War of Gifts: An Ender Story"
Author: Orson Scott Card
In a Nutshell: The acclaimed science-fiction writer has turned his considerable talents to a Christmas story set in interstellar space as Earth prepares to defend itself against an insect-like alien race. The first battles go badly, so the focus shifts to the training of generals who can fight such a challenging war and win. Because the students of the Battle School come from every walk of life, there is no religious observance allowed. This is the story of how Christmas has left its imprint in spite of enormous opposition.