Timothy Zahn 
Trial by Fire [EPUB ebook] 

Trapped underground, Kyle Reese struggles to stay alive and prevent the ultimate Skynet infiltration. Amidst the ruins of the VLA lab, Resistance fighters Barnes and Blair sift through the remains of their fallen comrades, searching for the body of Barnes’s brother. On the forested slopes of the mountains, a man battles through the trees relentlessly pursued by the Terminator.