The Raulden Gambit — G.L. Fontenot

Hi-jacked from Earth and unwillingly fused with another person, Ron Allison must find a way to rationalize his new reality and then fight to te death for it. Ron literally lands in the middle of a battle that appears unwinnable and his only hope for returning home is to defeat the most powerful race in the known galaxy. On top of that, his only ally is the person responsible for his abduction.