Programming Books

I already have several books on hand that I own the cover how to program and how to use various programming languages. And that's cool.

What I'm looking for is a book that has good challenges in it for a developing programmer. Program challenges like sorting strings, doing math, using ports and memory, etc.

Can someone point me in some direction here?

>>18 Yes, SICP - "Structure and Interpretation of Computer Programs" is definitely worth reading.

You can find a copy of the full text here: http://mitpress.mit.edu/sicp/full-text/book/book.html

Many of the ideas are represented in Scheme and since you haven't actually specified which paradigm you're interested in I can't actually recommend a book that would be well suited for you; but SICP is a fairly good read regardless of which paradigm you're programming.

If you want challenges, then what's better than writing a program like a compiler or interpreter?, I don't think you'll benefit much by writing small programs to accomplish challenges.