Unfortunately, not much. I was pondering that after my post. It&#x27;s been a <i>long</i> time since I was a math student, and professionally it&#x27;s had zero to do with my career. A lot of books ended up boxed up at my parents&#x27; home as I moved around a number of times right after college. I&#x27;ll check my own home tonight to see what I still have, but my shelves these days are mostly filled with fiction, programming, RPG, and history books.<p>EDIT:<p>Off the top of my head, for CS:<p>Introduction to Algorithms: <a href="https:&#x2F;&#x2F;mitpress.mit.edu&#x2F;books&#x2F;introduction-algorithms" rel="nofollow">https:&#x2F;&#x2F;mitpress.mit.edu&#x2F;books&#x2F;introduction-algorithms</a><p>Introduction to the Theory of Computation: <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;Introduction-Theory-Computation-Michael-Sipser&#x2F;dp&#x2F;113318779X" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;Introduction-Theory-Computation-Michae...</a><p>Math:<p>Calculus Made Easy: <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;gp&#x2F;product&#x2F;0312185480?ref_=cm_lmf_tit_5" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;gp&#x2F;product&#x2F;0312185480?ref_=cm_lmf_tit_...</a> - I&#x27;m really not sure how good this one is for a beginner, I picked it up while assisting my sister in refreshing her calculus skills for grad school (Aerospace Engineering)<p>I can&#x27;t remember the algebra and geometry textbooks (my dad&#x27;s or my grandfather&#x27;s) that I used, in addition to the assigned text, in high school.<p>Anything by Knuth. Seriously, one summer a professor and I just picked up copies of <i>Concrete Mathematics</i> and worked through large portions of it for fun. Technically I got some math credits for it, but it was really just because we wanted to. Actually, this one helped me a lot with understanding calculus. Somehow, up to that point while I <i>knew</i> calculus, may brain had never made the connection that integration was summation until I saw the discrete counterpart to continuous integration. I had a mechanical understanding, but no deep understanding until that moment.