Reddit reviews Operating Systems Principles

I used this book back in my OS class. Despite the poor reviews on amazon, it does a good job at explaning the basics of OS principles. It will not get you started on how to build your OS loader, but it will explain how to implement mutexes, threads, memory management ect. everything important - but it's on a high level and you will have to spend quite some time with the pratical aspect - but that's what you learn from anyway ;)

Might not be the best approach, but maybe start with an OS internals book . They're always relevant, even when the actual underlying algorithms of an OS change.

See OS Principles by Silberschatz.

I used to read the linux docs and not understand what half the terminology meant until reading an OS book. Although I used this book which is far more rigorous in terms of theory.