The "Mad Moon for Rubina" is the fourth part of the Ruby Four series, a science fiction audio play written by Meatball Fulton and published by ZBS in 1996. This 2 CD set is intended for young adults, ages 9-12, and adults, with a runtime of 2 hours. The story is presented in English and comes in a standard jewel case. The narrative follows the adventure of Rubina and her radio, offering an engaging and entertaining experience for listeners interested in science fiction.