Bertelsmann, which includes one of the major recorded music empires, is buying publishing companies and will soon control 1/3 of the US book market.

In addition to the usual dangers of too few competitors with too much power and lobbying strength, concentration in book publishing facilitates censorship by bullying. Here's an example.

I don't need to agree with Peterson's book, or know what views it advocates, to consider it dangerous to a free society for bullies to be able to prevent the publication of a book because they don't like it.

No company should be allowed to have even 10% of the book publishing market. Or the book sales market (down with Amazon!). Perhaps 5% is the bigger than we should tolerate.