Snape McGonagall Dumbledor

its brillant it realy looks like them, snape looks how he normaly does (like some 1's threw a lot of dungbombs at him and hes gonna get revenge) and Mcgonalll looks like how she would of looked like in hp 5 and Dumbledor looks how u'd expect him to look its just brilliant is this drawin based on the book hp 5?