Clojure is a dynamic functional general purpose programming language that runs on the Java platform. There’s lots of good reasons to learn Clojure. It offers a modern take on Lisp. There’s an excellent parser library, and a fully featured logic engine. In Clojure, immutability is the default. Once an object or data structure is created, it cannot be changed.
Here’s 8 free books that will help you master this language.