To the topic. I've encountered this: https://thecreativelawyer.typepad.com/the_creative_lawyer/2011/10/life-and-career-changing-books-for-different-mbti-types.html

There are different personality types, which have different core values, styles of consuming and producing information. For instance, I will not fall for a book, which mentions 1-2-3 algorithms to achieve some goal. I need a theory, from which I will be able to deduce what to do, when, and in which order (if I want to). It's ok to have 1-2-3 as an example, but I am finding it ineffective when the book reiterates the same thing again and again.

Likewise, I tend to share theories as well. And I am aware that many people do not have the same kind of information metabolism like me. And it is ok.

A theory is like a minimal piece of information about something. It can be either expressed abstractly and directly or through a lot of examples. In the latter case the reader like me just reconstructs the theory.

But not all books and materials are prescriptions! There is also an option to read "diagonally". Personally I found it important to understand the main points, and remember that even a casual observer influences the experiments of life.

You put it nicely with having X+Y theory instead of 2+2, 2+3, ...