David Reynolds hated machines and the network that drove them (and that controlled most human activity).  Rather than cooperate with the System Authority he chose to attack it.  As punishment he was exiled to one of earth's new penal colonies.  He was sentenced to serve as a convenience store worker in the great cave city of City 11.  Down in the 'world below.'  It was a dangerous place.  If he was to survive he would need help.  But who down there could he befriend?  Who could he trust?  Purchase it here:  https://www.amazon.com/World-Below-Novel-Future/dp/1985057204/ref=sr_1_1?s=books&ie=UTF8&qid=1519532792&sr=1-1&keywords=The+World+Below+Paul+Duerksen&dpID=410bqWlR82L&preST=_SY291_BO1,204,203,200_QL40_&dpSrc=srch