Bardi writes in a wildly variable style which is infuriating to the discerning reader. There are occasional typographical errors, frequent grammatical solecisms (split infinitives aren't always wrong, but they are here!), the use of ?! and frequent unnecessary references to the author himself eg p29 "I saw a copy of this notebook on display..." followed by an account of the reactions of a woman and her son. He refers to France anachronistically as a "superpower", and refers to "the Brits" in what is an unforgivable colloquiallism and another anachronism, as Britain did not exist at the time writing as anything other than a geographical entity. There is also lots of flabby repetition. No doubt a good book is to be made of this subject, (probably by Lisa Jardine) but this certainly isn't it.