The complicated love life of French President Francois Hollande is examined in the book, Between Two Fires - Entre Deux Feux, looking at the rivalry between his partner and ex-wife.
Previous presidents would not have faced such public scrutiny of their private affairs.
Journalist Pierre Haski, who co-founded the Rue 89 news website, said the allegations about former potential candidate Dominique Strauss Kahn "broke this whole status quo in France and opened the door for investigations into private lives when they have political consequences".
France 24 London correspondent Benedict Paviot spoke of the "slow poison" of news about the president's private life, and recalled a now-famous tweet from Mr Hollande's partner about his ex-wife Segolene Royale.
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