I muttered crossly.
I muttered crossly while wondering if she got paid by the adverb and if people in England are extremely fond of muttering.
Below I've underlined a prime example of a sentence that tripped up my 9 year old emergent reader:
"Harry, Ron and Hermione joined the Gryffindors streaming up
the marble staircase and, very tired now, along more corridors, up
more and more stairs, to the hidden entrance to Gryffindor Tower."
Harry Potter and the Prisoner of Azkaban, p 74
Where was her editor? Did no one at Bloomsbury have the balls to say, "Fuck off with that 'very tired now' aside and stay on point. Don't use 'more' three times in a single sentence."
Pass the butter beer. It's going to be a long couple of months.