there are a few books you can get: https://www.amazon.com/gp/product/1565923987/ https://www.amazon.com/dp/0262033844/

A lot of "classic" problems are so embedded into CS professors that they don't even see them as problems anymore (lazy caterer, pick's theorem, etc) so if you didn't study these classics explicitly in school you have to discover them on your own.

early in my career, those two books were on my desk continuously: https://www.amazon.com/Network-Programming-Perl-Lincoln-Stei... https://www.amazon.com/Mastering-Algorithms-Perl-Practical-P...

later, it was time for https://www.amazon.com/How-Win-Friends-Influence-People/dp/0...