Riddle: The Three Mystical Cats and the Wizards' Quest

In an enchanted realm, three identical cats, each with the ability to walk and talk like humans, guard the secrets of knowledge. They are EneMieu the Bookkeeper, IeuNeme the Booklender, and MinNem the Librarian. Each cat is exceptionally intelligent, knowing every language and the name of every living thing.

**EneMieu, the Bookkeeper**, benevolent but enigmatic, takes back books at unexpected times. 

**IeuNeme, the Booklender**, generous yet melancholic, lends books, often when they are not requested.

**MinNem, the Librarian**, a malevolent entity, can disguise as either the keeper or lender. Dealing with the Librarian brings misfortune.

Three wizards, each at different stages of their magical journey, seek to unravel the mystery of the cats and break a curse inflicted by the Librarian:

1. **The Young Wizard**: Experienced beyond his years, was lent a rare book of common knowledge.

2. **The Middle-Aged Wizard**: Moderately skilled, was lent a common book of rare knowledge but it was taken back by the Bookkeeper.

3. **The Eldest Wizard**: Lacks experience and is cursed with misfortune after dealing with the Librarian.

**The Challenge**: The eldest wizard has gathered his peers to break his curse and to understand the true nature of the three cats. How do they accomplish this?