This book was just okay. It ended up being more about Josh and Sophie than about Nicholas Flamel. Not only that, but it felt cluttered with every god and goddess and a lot of name-dropping that will definitely date the book in a few years. 
 It was pretty generic, relied a lot on cliches, and the characters were pretty superficial. It was mentioned at least once or twice that Josh and Sophie were not identical twins...they're different genders, so if they were identical, I'd be concerned. And then wonder why we never heard about twins of 2 different genders who were magically identical. I get some of the characters are hundreds of years old, but they act like fraternal twins are a new concept. 
 I was reminded of the Percy Jackson series when I was reading it- gods, goddesses and people living for centuries amongst regular people, prophecies, and a couple of 15-year-olds who need to save the world. 
 I give it a 1 out of 5. It's far too generic for me to like it.