Heros and Srewups Haven't Changed
First, this is an adventure story that will hold your interest throughout.
Second, it shows we haven't changed much in the last couple of hundred years. The government finds a hero who does great deeds, but then through red tape and politics nearly undoes both the hero and his good deeds. Eaton is in the tradition of John Paul Vann anf Benedict Arnold (before he turned his coat). These were men who accomplished a great deal with very few resources and despite many obstacles thrown up by higher commands.
We also discover the complexities and dangers of the Arabic world haven't changed much either.
But most importantly, we see that some Americans can do and inspire others to do great deeds with courage, endurance and an indomitable will.