Westminster residents are some of the sauciest in the country with many borrowing raunchy novel Fifty Shades of Grey from the library.
The London borough has one of the highest rates for borrowing the books in the UK.
The area has seen the title loaned out 34.3 times per 10,000, according to figures from a Freedom of Information (FOI) request to councils and library management organisations.
Westminster libraries have loaned out the title 777 times; with the highest numbers being 155 loans at Church Street and Victoria Library with 152 loans.
In terms of loans of all the titles in the series, Westminster is also among the areas most likely to borrow them from the library. The area has seen the titles loaned out 78.7 times per 10,000 people.
So far 144 out of 207 councils and library management organisations have replied to the FOI.