This book is part of a series and I have not read the other books. I was a little confused in the beginning, but then everything fell into place. I suggest you read the first book in the series before reading this one, but this is still a great book on it's own.
My favorite part was the beginning because when I read it, I felt like I was part of the story. My favorite character is Agent Umber, because he has a pickle phone and I think that's funny. Electromagnetic sources sound spooky...
