I second the recommendation for "Foundations of Computer Science." (and for the other books as well, but wanted to highlight it.) For a second or third book, c

I second the recommendation for "Foundations of Computer Science." (and for the other books as well, but wanted to highlight it.) For a second or third book, consider 'Algorithm Design Manual', Skiena. I find it more approachable than the MIT Intro to Algorithms. Also, 'The C Programming Language' remains one of my favorites for a pragmatic approach to learning how to say things to a computer, a great balance to learning the theory. There's a reason 'Hello World' has become so widely known that it's a cliche. But there is plenty of great advice there no matter what language you're in.