What a boring book you're reading

Jonathan: What are you doing, Elizabeth?
Elizabeth: What am I doing? I'm reading. What does it look as though I'm doing?
Jonathan: What are you reading?
Elizabeth: book, silly. What do you think? You can see I'm reading a book. 
Jonathan: I wish I could have a look at it. Do you think I could have a look at it,Elizabeth? Elizabeth, is it an interesting book?
 Elizabeth: Yes, a very interesting book. But an adult book. [bad word] and have a look at it and then go away and leave me alone. 
Jonathan: But what an awful book! It looks as boring as anything. How can you look at a book like that? What does it say?
 Elizabeth: Jonathan! You're an awfully boring and annoying little boy! Go away!