The book deals with a few different themes, including family, crime and terrorism. In particular, the theme of family is explored really well because all through the series Alex has been looking for the truth about his family and in this book he finally gets it from his father's best friend. Crime and terrorism are also dealt with well because the schemes of the Snakehead are very well thought out and elaborate, and are made more realistic and believable because, in theory, they could actually be carried out and happen, which makes the book much better, in my opinion, because when you're reading it you don't have to imagine a far-fetched scheme that could never happen.
The book has many interesting characters, especially the main character, Alex. Despite the normal image of a spy, tough, smart and fearless, Alex is shy, vulnerable and hates the fact that he's a spy and just wants to go home and have a normal life. Also, because he is a fourteen-year-old boy, I found it quite easy to realte to Alex because he's not that much older than me. Alex is different from the stereotypical image associated with spies because he's only fourteen, which, in my opinion, makes him a more interesting character.

In conclusion, the book 'Snakehead' is a thoroughly enjoyable read and is a good book in almost every way. I would fully recommend this book to anyone, as I had a good time reading it and I'm sure lots of other people would too.