I can't quite put my finger on it, but something about these books reminds me strongly of the Vladimir Tod series by Heather Brewer (and that's a compliment). I think it may be Casio's voice. The tone and writing style are both terribly appealing to me. I love how dark the story was, and yet I could still relate to Cas and his friends. This is the perfect blend of teen and spooky - I can see it making a great TV series. If the first book was more of a classic ghost story then this book was a bit more of a mystery/adventure. The ending was perfect, even if it was a hit to the gut. I'm looking forward to trying out Blake's newest book, Antigoddess, to see how she takes on the Greeks.