Erk and some kind of a book

Erk is a simple teenager, living in Earth. He couldn’t ever imagine, that the magic exists. He meets the Death in the flesh, after conversation with which he founds himself in another world. Here he faces his worries, fears and uncertainty. He got acquainted with Blue Cat and Green Owl, who help him to get rid of commonly imposed stereotypes and overcome humanity’s drawbacks. He becomes the only wizard of his life.