It serves its purpose, just like any airport novel, it's written well enough to convey its rip roaring type story, and it does it relatively well.

Now if we are talking written to a standard that would satisfy elitist literary snobs? Then no, it'll never do that. But then since I daresay 90% of people have no idea about what literary conventions satisfy a 'well written' book, and instead just like what they like, which in most cases is a story rather than how 'well' it's written, that's fine.