The final book in the trilogy is equal to the task set before it with its predecessors. You absolutely hate the villains, you aren't sure of the outcome, you want to shake the title character and her protectors - in other words - it's fabulous!
The second book in this trilogy is as outstanding as the first was and can stand alone very well. The characters are so well defined and so humanly drawn that you don't object their failings. This is a must read.
Robert Heinlein has taken a pretty believable situation - colonization on the Moon - and turned it into a political and social commentary with insight, humor, and advenure. Do not get bogged down by the beginning of the book's scifi assumptions. Continue into the story and you will be rooting for some fairly unlikely characters.
How far do you have to go for your company? How far do they have to go for you? Is everyone supporting the cause? Fun reading.