The Forces of Darkness ~book one of trilogy

Everything was going great for sonic and shadow,until eggman returns from 5 years of building a new robot that is basically is indestructible. They barely manage to beat the robot but somebody dies in the process. I won't tell you who died because it's a surprise,but let's just say Sonic's really close to that person. Sonic's inner darkness sets free after facing the death of his friend,turning into dark Sonic and goes out of control and destroying the world.With Silver gone Shadow is the world's last hope.Will he prevail or will the world die to dark Sonic's hands.This is my first book on this account so I hope you enjoy!:)