I loved this book. It was a fast easy read and I couldn't put it down. The characters and the banter between them was great and realistic, and it's like a roller coaster ride from start to finish. The research the author has done into Egyptian mythology etc shows, and there is a good mix of humour in with the action and angst. Some of the dialogue and narrative was amusing, very typically kids of that age. 
 This is a book that I would highly recommend, and my only complaint is that it's the first of a series and where are the rest of them????? This is by the same author who wrote the Percy Jackson series which I haven't read yet. I will have to give them a try, if they are anywhere half as good as this book they will be well worth reading.