The recommendations I got from lecturers at university were thick academic textbooks. The 'good programming books' popular on HN etc. - without taking anything away from them - tend to be more waffley blog-turned-book type things.
Aside from classics from the former category that are also popular in the latter. Sipser, the dragon book, Spivak, etc.
Best example that comes to mind is the first edition of SQl in a nutshell. It was thin reference that covered SQL and the major differences between different SQL databases that I picked up back in 2002 ish. Quite useful if your working with several at the same time, but not something to teach you SQL. I haven’t looked at a recent edition because I am not in that situation any more, but I presume it’s still useful for that purpose.
Granted most books are significantly more verbose, but the physical limitations of books can promote extremely precise writing with minimal extraneous information.