I Am Number Four by James Frey

my book is about the super natural world in this book where a boy named john has a beagle that can change into a different form they call him a chimera and john has super powers called legacies but him and the numbers 4-10 are being hunted three have died john is trained by his cepan so he can get strong to kill the mogadorians the aliens that want to rot earth for its resources to make the army unstoppable they have already destroyed lorien john has to find the others to train and kill setrakus ra the mogadorian leader.