I was about to suggest it was an option piece, which is IMO worse, as news has to attempt to be reasonable while opinions just masquerade with the same reputability.
But then I scrolled to the bottom, and realised it's even worse than an option piece, it's a long-form advert:
> This is an edited extract from an essay first published at dobelli.com. The Art of Thinking Clearly: Better Thinking, Better Decisions by Rolf Dobelli is published by Sceptre, £9.99. Buy it for £7.99 at guardianbookshop.co.uk
With a headline like that, I expect an article citing various sources and experts, not a book summary. As it stands it's mostly an opinion piece. They have a separate section for opinion and they use a different background colour (a light orange). I don't want to invest in an article then see it cut short with an advert for the rest of the meat in the book.