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Are you looking for a book geared toward a particular language, or one aimed more at better general programming methodology, regardless of language?

Either and both. I am a Python user with some C/C++ and Fortran experience. I dabble in other things, but those are my primaries.

Then I would say The Elements Of Programming Style, and possibly this one (I haven't read it, but from the description it seems to be what you're looking for): https://www.amazon.com/Elegant-SciPy-Art-Scientific-Python/d...