The Sababa programming language is a simple, light-weight, and minimalistic Lisp implementation created by Dor Rondel. As of 2015, the language is still in its creation process, and therefore, shouldn't be used for non-experimentation purposes. The language does vary slightly from other Lisp dialects, for example with its symbolic expressions; however, it still retains Lisp-like features (such as Polish notation etc.) The language was created for fun and recreational use, largely following Daniel Holden's http://www.buildyourownlisp.com/. Aside from the guidance and knowledge, I'd like to thank him (and several others) for creating the Micro Parser Combinators (MPC), which Sababa utilizes.
The language is open source, and is therefore open to public contribution. It is licensed under the Apache License version 2.0! Sababa's code can be found in its public repository here: https://github.com/Dor-Ron/Sababa-Lisp/blob/master/REPL/uniform/REPL.c.
For any questions regarding the language, or if you have any errors to report regarding the book or Sababa, you may use the contact feature built-in to the site.
Enjoy the read :D