Not bad. Not great. But not bad. The look and feel of the illustration is a bit too "straight forward" and lack a certain "style" and personality. It is more like a complementary textbook illustration to the text. (Sorry). Read the book before and it is a nice way to enjoy this book in a diff...
I can imagine how this would make a great film. Interesting and compulsive. Alex Rider is the perfect undercover spy and the illustrations are great