IQ is the most accurate measure in the behavioral sciences, followed by the big5

IQ is the most accurate measure in the behavioral sciences, followed by the big5/6 trait/facets, with stereotypes the most accurate measure in the social sciences.

There are volumes and volumes and volumes on this subject and none of the professionals disagree. And certainly the people who author the testes don’t disagree. The disagreement is from people outside the field or people tangential to it (Psychology today) that have other motives.

Just search amazon. And pick one of the academic sources. I don’t want to recommend ONE. But there are at least a dozen books that carry it. You will find the best information in research publications instead of books, and that’s just ‘google scholar is your friend’.
I keep a reading list but that’s a bit nerdy for general consumption.