Programming/development Books

So here's the deal. I dropped out of university... a few times... and have fallen back upon writing software for a living. I'm very conscious of the fact that having never studied it at college I am probably not following best practices etc.

I work mainly in C# but would like to expand my knowledge and study properly on my own. Anyone suggest any good texts for me?

tl/dr: Good programming books for students?

>>30
 Even a Geek Can Speak by Asher.
The LaTeX Companion.
The TeXbook by Knuth.
Calculus by Spivak.
comfortably edit a file with emacs and vim;
The Unix Programming Environment by Kernighan and Pike.
 The following languages provide a reasonable mixture of paradigms and practical applications:

    Racket;
    C;
    JavaScript;
    Squeak;
    Java;
    Standard ML;
    Prolog;
    Scala;
    Haskell;
    C++; and
    Assembly.

    How to Prove It: A Structured Approach by Velleman.
    How To Solve It by Polya.

    CLRS.
    Any of the Art of Computer Programming series by Knuth.


    Introduction to the Theory of Computation by Sipser.
    Computational Complexity by Papadimitriou.

Gödel, Escher, Bach by Hofstadter.

lol