Sirenix Book

The Sirenix Book is the Winx Club's guidebook to achieving the power of Sirenix. At first, they couldn't open it, until the Winx won the challenge in Graynor, and gained the power to unlock the book and open it. The Sirenix Book gave the Winx the Sirenix Boxes and their Harmonix powers. It also gave the Winx Club a warning about the curse that was bestowed upon the power.

During the time, it gave Winx riddles that leaded them to the Gem of Self Confidence through Andros to Solaria, Gem of Empathy through Melody to Zenith and Gem of Courage through Linphea to Domino. When final gem was acquired, the book disappeared as it was no longer needed.

The Sirenix Book is voiced by Larisa Oleynik in the English version.

Trivia

 * Oddly, in Italian version Book has male voice, while in English version it has female voice.