Delightful mix of The Lion The Witch and The Wardrobe (the secret room reminding me of the wardrobe), and Hansel and Gretel. Good introduction to vampire lore (they can't enter a house without being invited in by the owner) and a bit of remedial Van Helsing. An easy read that would keep children interested. My only slight criticism is that the ending was very quick, and a bit blunt. But overally, a fun, fairy tale twist.