Not bad, but not really good.
It's pretty decent, and as an ad for the book, it works well. But on its own, as a game, it falls short.
The main problem is the lack of explanation of any of the terms or what the icons in the airplane window mean. I understand that the idea is to spark curiosity in the system the book is about, and that the trial-and-error way of learning the game is intended to use repetition to get the name of the book in people's heads and make them more likely to click the link to the website. But it detracts from the gameplay significantly.
The graphics are a detractor too. They appear to be made from cell-shaded Poser animations. The adjustment of the proportions from within that program stand out as being exactly what they are, and nothing more. It would have worked a lot better with hand-drawn graphics similar in style to the ones on the cover of the book the game was made to push.
The airplane gameplay mechanism is cute, but doesn't really fit. If the idea is to make intelligent decisions about what to do next, then using an action game and near-random icons probably isn't the best way to make the players choose their next actions. A simple multiple choice answer system with a timer would be better suited for this sort of thing. It's simple, and it's been done to death, but it makes more sense than putting a mini-action game where it doesn't really fit.
I do really like the way the interface in the very beginning works though (the overhead click-to-walk thing). That's really nice.