I have to jump in and mention: Knuth's TAOCP Vol 1-4 "The Art of Computer Programming" Vol 4 was just recently published
I'll admit I've not read it from cover to cover, I pull out one of the volumes and pick a topic and read. I'll be reading this for the rest of my life. Tannebaum's "Modern Operating Systems". I just found out it's in its 3rd editon. I had a 2nd edition copy that stayed with an ex-girlfriend. I need to replace both (girlfriend and MOS).