Triorion: Abomination
Book II in the Triorion series
Published by L. J. Hachmeister (2012)
As we learned in Book I, the Alliance, in their efforts to gain military advantage over an invading alien force, put together a program to train children, not only as soldiers, but as tacticians and military thinkers. Three children, taken from Fiora where they worked in the mines, barely staying alive, were an unexpected surprise, more brilliant than even their best adult members, in spite of their peculiar aging process -- this brilliance came from children under 8 years old who looked like young adults..
In Book II we find Jaeia and Jetta well established in the military chain of command (looking more like 23 than the 8 year olds they are), in positions of responsibility but without their brother Jahx, a traumatic loss.