Wizards and the abandoned planet

A science fiction with tomarry and sebaciel.A crossover with Harry Potter,Kepo, and black butler.This is not concentrated mainly on the ships and mostly concentrated on trying to navigate on an abandoned earth where new creatures roam.This is my first book so be warned that it might not be that good.It only has one part but if you like I can write more they probably wouldn't be as long cause I was initially going to turn it into a couple chapters but decided against it.Black butler doesn't show up until the end of the story and it's a pretty bref encounter.