Each book in this series has gotten more intense than the last as Cleo struggles to live up to the prophecies about her. After the tragedy of losing a friend in book 3, which Cleo blames herself for, Cleo isn't about to involve her friends in her latest escapade. Especially since the council (most of them) didn't want her to seek out the Golden Lion (fallen star of great power) in the first place. But this is Cleo, who acts first and thinks later, and she convinces her friend Brian to help her get to the planet where the Golden Lion is supposed to be. But despite the warnings about snow, Cleo is not prepared for what she finds: blizzards, enormous snow spiders, and a thief (Antony) from her past. Forced to team up with Antony, Cleo fights to survive and stumbles into something unexpected. And when the enemy shows up, she's forced to fight. I have to admit, the ending of this one stunned me it was so unexpected. In fact several things happen at the end that really surprised me, but which open up some rather interesting new questions about just who Cleo is and what she's supposed to do.
This is a fabulous series for young adventure readers who like a good dose of humor, courage, and the unexpected. The relationships are fun as well as Cleo and Antony (who didn't see that coming) get to know each other better amid all the storm and strife. Combining historical fiction and science fiction has turned out brilliantly in this thoroughly entertaining series.