One of her top advisors, Éric Besson, resigned soon afterwards over a disagreement about the costs of this programme, which he believes could reach €35 billion, while others in the campaign team wanted to delay bringing out that figure.figure was equivalent to that of Mr. Sarkozy's but higher than Mr. Bayrou's, who was becoming a key figure in the race. This led to an unusually bitter fall-out, and Mr Besson writing a book titled "Qui connaît Madame Royal ?" (Who knows Mrs Royal?), published on 20 March. In it, Besson accuses Royal of being a populist, an authoritarian and a luddite and says that he will not vote for her and hopes that she is not elected. He then went on to join the Sarkozy campaign and was rewarded with a junior position in the next government on 18 May 2007.