The Android Chronicles Book Seven: The Android Return

The android world, led by Luke and his allies, is slowly rebuilding after the devastation wreaked by Ampheas's Alliance. But even as those closest to him struggle with inner turmoil and a heartbreaking loss, an android calling himself the "Architect of Death" has a gruesome and deadly plan in the making. It will take all of Luke's power and abilities to stop him before it's too late.