a book of?
i have a question .the following is the passage from BBC
The issue of bullying at work has become a hot potato recently in the UK after a political row erupted in which the UK Prime Minister ***was accused in a book of bullying aides at No 10.
the question is how to understand "was accused in a book of bullying aides at No 10"? what is the meaning and usage of "a book of"?what is NO 10
thank you very much ,Jura
i just want to say thanks by send you a message ,but i have no permission,haha,so ,i want to say thanks here