Same for me. The book and its tools are extremely empowering. In general, anything from Sanjoy Mahajan (the author) is extremely insightful:
-Street Fighting Mathematics
-The Art of Insight in Science and Engineering
-Lecture notes on signals & systems (a bit harder to find)
-Lecture notes on thermodynamics (real-world insights rather than endless manipulations of weird partial derivatives)
Afaik he is currently working on a textbook on mechanics.
Afaik he is currently working on a textbook on mechanics.