Books like The Ghost Brigades by John Scalzi

The Ghost Brigades serve as the Special Forces of the Colonial Defense Forces, engineered from the genetic material of fallen soldiers to yield perfect, unflinching troops. In an expanding galactic frontier, humanity faces an alliance of three hostile races, buttressed by the treason of scientist Charles Boutin, who holds critical secrets of the CDF. Jared Dirac, a superhuman hybrid derived from Boutin’s DNA, is entrusted with retrieving the scientist’s memories through a brain transplant. When the transfer falters, Jared is absorbed into the Ghost Brigades, where he initially embodies the flawless soldier archetype. As Boutin’s memories gradually surface within Jared’s mind, he begins to unravel the motives behind the betrayal and discovers that humanity’s enemies harbor ambitions far more perilous than mere extinction.

First publish date: 2007