The Bible said that when God created the earth, Angels are watching it. As we knew, one the Angel will be the center of influence in the rebellion against God in His most pure creations.This has been a long and eternal war that up until today, still left some questions among all God''s believers this days..- If God know all things, why He let the devil to revolt against Him?- Jesus died on the cross to redeem sins and devil has been defeated. But why the devil can still influence people to do bad things?- Prayer is the weapon against the devil. If it''s so powerful, can it make any different?In this book, the writer try to answers all this questions. Focusing on the most important events, the writer also describe how Jesus has won against the devil.