Agree that it is an ad, but is it fundamentally that different from any companies blog post? i.e. that's part of their marketing too. All this ad is an excerp

Agree that it is an ad, but is it fundamentally that different from any companies blog post? i.e. that's part of their marketing too. All this ad is an excerpt from the book, so closer to linking to something in books.google that one finds interesting.