What's the Name of That Book??? discussion

My 6 year old nephew is having his tonsils removed and we’d love a book to help prepare him for it. He’s very logical and likes to understand things and ask lots of questions, and is also quite anxious.
Any suggestions?

I haven't read them but these are free to borrow on openlibrary.org.

Tonsillitis by Kenneth T. Burles https://openlibrary.org/works/OL18277...
Good-bye tonsils! by Juliana Hatkoff https://openlibrary.org/works/OL77955...
Danny's tonsil story by Marjory Yacco https://openlibrary.org/works/OL27717...