Ask HN: I'm looking for a good book on the fundamentals of CS

I'm at the beginning of my software dev career, and as I didn't go to school for anything related (B.Sc. Chemistry), I feel like I really would like to have the fundamentals of CS down. Doubly so as I would like to go into the field of VR, and right now I'm working on my own toy rendering engine, which I feel is really exposing my lack of knowledge...

Anyways, any suggestions welcome. Ideally it'd be more digestible than just a plain textbook but I'm open to anything. I imagine either way it'll be a tough but great read to work through :)