Flynn is an excellent writer, and this is a very nice conclusion to the Firestar series, which was begun in the 90's as near-future hard science fiction but is rapidly becoming alternate history. The books really need to be read in order.
In this final entry, space industry matriarch Mariesa Van Huyten's nightmare has come true with a twist that even she didn't imagine: not only is the planet endangered by an impact from an asteroid, but the evidence indicates that the object has been deliberately aimed at Earth. Largely thanks to her tireless efforts, mankind has the capability to possibly intercept it and avoid disaster.
The cast of characters now spans three generations: Van Huyten and her peers, who established a profitable, privately owned space program, and the test pilots who flew the first reusable spacecraft; "Mariesa's kids", graduates of her privately funded school who became engineers and pilots and code crackers and artists; and the young Academy graduates who have grown up with the now realistic dream of going into space.
I have to point out that the cover art is ridiculous. What's with those cartoonish spandex space suits with the clear bubble helmets? This book is set in 2017, not in 2517. They should be wearing suits not much different from what you see NASA astronauts wearing today. The artwork is disrespectful of the most compelling element of the Firestar series, its realism. Fans of the modern-day space program will be moved by the plausible alternate history established in these books and left frustrated that we don't have a real-life Mariesa Van Huyten to push, pull and prod mankind out into the solar system.