I agree on the missing stuff thing.
e.g.
individuals who become residents may qualify for a special retirement regime if certain conditions are met. This regime may exempt foreign-source income from income tax and provide other tax benefits.
That's all. And it's not telling you 1) the name/law of the special regime 2) the requirements.
If you just base your research on this , then that country may seem a non-interesting one.
But if you dig down to the details from other sources, you'll find it is a very interesting regime and many are using it and paying 0% legally
It's missing the most important thing. Who cares about the 20or 30 or even 40% standard tax brackets for locals when there are special regimes for foreigners that allow you to pay 0% or close... and that book is not telling you that.
imho is just a big picture for someone that's just stepping in and need a global overview. and written by their interns...
i mean it is impressive as those are almost 2000 pages and a lot of (interns) work but... is it really quality, is it really useful?
You better find local experts that know the local tricks and practices, as that guide is omitting (on purpose I'd guess) many interesting "niche" tax regimes/incentives.
And that extra info costs... and their specialists are expensive too... cannot give away such info for free...