Helena Frith Powell is the author of All You Need to Be Impossibly French: A Witty Investigation Into the Lives, Lusts, and Little Secrets of French Women and other books.
Back in 2005 she named a top ten list of "sexy French books" for the Guardian.
Her argument for the list and one title from it:
Why are French women so sexy? Ever since 1066, we've been enthralled by the innate superiority