Worldwide population peaked sometime between 2015 and 2020 at somewhere between 7.2 and 7.4B. So my take on the book is that it isn't very good.

Also, biofuels based on most crops other than sugar cane, in addition to not being very helpful in the fight against AGW, triggered large price spikes and political turmoil in a dozen different countries at once. Perhaps you heard of this event, we call it the Arab Spring. We are still dealing with the fallout of it.