A Boy and His Bot / Daniel W. Wilson / 180 pages

Code Lightfall is on his end-of-the-year 6th grade field trip to the Mounds in Oklahoma.  His grandfather, John Lightfall, disappeared on these very mounds just one year ago.  When Code attempts to escape the taunting of one of his classmates, he notices that a crack in a tree seems bigger than it should.  He investigates, finds robotic creatures and his grandfather being controlled by Immortalus (sp?).  His grandfather is king and his kingdom is heading toward disassembly.  Code searches for a way to free his grandfather and end the Great Disassemby with the assistance of Gary, his self-designed Slaughterbot.