The Secret of the Sphinx

The students of the "Crystal" school are bewildered: their friend Frankie has gone missing during the last confrontation with their common enemy Andrew Milling! They can only guess where he is and whether his life is in danger. But finally,... Frankie sends an encrypted message. Karag and his classmates learn that their friend has fallen into the enemy's lair and is forced to pretend to be a supporter of Milling! How soon will he be exposed? And most importantly - how can he escape? The guys simply must come up with a brilliant rescue plan! Otherwise, poor Frankie is in deadly danger…
 
Series Children of the Forest:
The Transformation of Karag
Dangerous Friendship
The Secret of Holly
The Puma's Revenge
The Secret of the Sphinx
The Day of Fire
Karag and the Wolf Trial
Twelve Secrets