The Bard could well have written the ‘hell hath no fury’ line with former French First Lady Valerie Trierweiler in mind. For her breathtakingly nasty kiss ’n tell memoir on the seven years she spent as partner of President Francois Hollande has become a publishing sensation here with sales outstripping even Fifty Shades of Grey. It has provided gossip and entertainment to a nation in the grip of a deep economic malaise, given fodder to the country’s chatterati and twitterati and perked up an otherwise grim, sodden summer.