One of the books sitting permanently in my heart An Introduction to General Systems Thinking (1975) by Gerald Weinberg is just a masterclass in how to write non-fiction.
It is a freestyle introduction to systems thinking (aka systems theory etc.) and if it happens to work for you too it may just T-9* your fluency of thinking.
Personably idiosyncratic in style and markedly interdisciplinary in scope.
Massive re-readability factor. (huuge)
*) Not WD-40.