Seven Languages in Seven Weeks

This programming book introduces seven paradigms through seven programming languages. The ideas and concepts from these languages have influenced many modern languages today. Without Haskell there would surely be no Swift, Kotlin, or Elm.

Exposing oneself to new ideas and concepts is helpful for perspective and problem-solving. For example, Prolog and Erlang might seem like strange programming languages with little application, but understanding them might be more beneficial than you first might think.

You might want to revisit Exercies for Programmers and try to work through it with one of these languages.