Best TOK book?

Looking for TOK book recommendation. Is there a textbook/workbook combo out there?

I guess I’ll bump this…
Or any sort of books with issues and questions in science, social science… (like “why do it and why not do it” ???)

My kids used the standard textbook published by the IB. Doesn’t the IB school issue this textbook?
https://www.amazon.com/Theory-Knowledge-Diploma-Full-Colour/dp/1107669960

They wouldn’t, it’s not an IB school, but I’m looking into the different books and trying to figure out which one is the clearest and most interesting.

There’s a Cambridge book… 100 pages…

but TOK, in my school at least was taught to be fluid, and is what you think kind of… nothing ‘studyable’

That being said, why waste ur money when a free ecopy is lying about?

https://mirror.uu.sg/ib/IB%20BOOKS/Core%20-%20Theory%20of%20Knowledge/