Math and engineering books, particularly those with good derivations and lists of facts. For example, one of my favorites is Digital Signal Processing by Proakis and Manolakis. It is basically an encyclopedia of classical DSP, with excellent derivations and practical information about how to efficient and correctly implement Fourier analysis on a real computer.
Awesome. I have a ton of books on Scientific Computing like Numerical Recipes by Press et al. Also a lot of advanced engineering and physics book. But mine are specifically related to Civil Engineering. My favourite is The History Of Theory of Structures, which chronicles the history of analysis of civil engineering structures.
That's super interesting! My parents were both civil engineering majors, and my dad still works in the field.
Also big thank you for name-dropping Numerical Recipes. I checked it out on LibGen and it turns out to be something I need. I'm taking an embedded systems class where we need to do a bunch of C programming and I was just reading a numerical analysis book (Classical Numerical Analysis by Salgado and Wise; it's more theoretical) the other day, so it's going to be really helpful to see some nontrivial C code in a context I understand. Thanks!