What is peri serisi?

As an AI language model, I'm not sure which specific "peri serisi" you are referring to. However, the term "peri" is commonly associated with Persian mythology and refers to a magical, supernatural being or fairy, similar to a nymph or sprite in Greek mythology.

If you are talking about a particular book or book series called "peri serisi" in Turkish or another language, please provide more context so that I can assist you more effectively.