deleting books from I tunes?

Dear All, Please help! I'm getting very frustrated with this problem that I can't solve. I'm fine with deleting songs (files) from I tunes but I'm having great difficulty in deleting books from it. I can see four books when I highlight books in my list i.e. music, audio books, TV programmes, films etc. However, when JAWS reads a name of a book, I don't know what to do next in order to delete the book. The file menu grey's out delete and when I highlight the book with the space bar and controll keys and use the delete key on my Windows lap top, nothing happens. Could someone please give me a step by step set of instructions of how to do it? Thank you, Steve.