Our politicians generally turn once in their lives, often rightwards, but this guy is thirty and has already bounced between so many attempts at becoming "important" ASAP, within unrelated and ideologically incompatible currents, abandoning them or being forced out almost immediately. Clearly, he has a lot more ego than resolve, probably needs psychological help, and I hope he won't be another psychopath getting into meaningful power.
In this book JB explain how rich peoples invest the political side in various ways to keep their benefits high. XN is one of them, specially because he was self-made and have no relations.
JB say the problem is not that rich peoples try to keep their influence, it's that noting prevent (and punish) them to do so.
It's not about being evil or not, it's about how evil can be part of the game (because political campaign funding).
A big issue with the book was that, even though some claim look legitimate and really not surprising for any French people (Macron being helped by a few powerful people was no surprise, he came out of nowhere and had suddenly more press coverage than any other candidate), it was also making a lot of heavy, and sometimes weird, accusation about some people, one of them being X. Niel, with nothing to back them up.
It also didn't help that the author was writing in a way that really looked like he was settling some scores with people instead of actually doing a journalistic investigation (he seemed to especially bare some hatred toward X. Niel). It helped even less that he started beef with anyone criticizing his book, especially respected journalist and news outlet.
- control the #1 French newspaper, "Le Monde" (extremely poplar on the Web, too), is buying up other media (Nice-Matin, most recently), is/was also influential in opposition media (e.g Mediapart)
- his spouse is the first daughter of Bernard Arnault, the 3rd richest man in the world, and together they form the most powerful couple in the country