[lumb63]

Others have given a lot of good suggestions about books for general software engineering. Some book on how to structure code and some book on how to be a professional and some book on the human aspect of the profession would all be beneficial. Pick one that covers each of these areas and they’ll provide you a good foothold.

I’m surprised I don’t see more advice to read a language- or domain-specific book. If you know what type of technology you want to work on and what language(s) you want to use, I’d read a book or two to gain expert-level understanding of those languages or domains. I cannot tell you how beneficial it has been to me to read books covering all the intricacies of C, C++, and Rust. Not to mention countless pages of documentation covering the Linux kernel, shell scripting, etc. Even if you have great general software engineering skill, you still have to be able to quickly read, write, understand, and modify the code you work on. You never know when you might find yourself 50 files deep in an exploration of why some open source software behaves a certain way that’s really boiling your blood, or when you need to parse the code to find an undocumented feature you’re certain exists (or, if not, to hack it in). Knowing the language is very beneficial for this, and getting eyes on open source code to recognize common patterns is very useful.