Wow wow wow! This is a "novella" in the GFL series, but is longer than a lot of books I read. I'm a HUGE, super mega huge, fan of the GFL series, but this might be my favorite book that Sigler has done.
I don't want to spoil, so I'll just stick with a recommendation. I can't see any SciFi fan not loving this book.
The GFL books are a special treat in audio. Scott Sigler narrates all of the GFL books and the delivery and production is off the charts. I've listened to probably over 100 audio books with many many narrators, and Scott is simply on a whole other level.
If you haven't gotten into Scott Sigler, just do yourself a favor and do it. Look at the reading order and do it. All of his books, present and far future, exist in the same sprawling universe. There are water eggs everywhere that just further enhance great stories. Quite frankly, possibly the most well thought out universe in all of scifi. I'm a huge Peter F Hamilton fan and he's known for his world building. Scott's world building is on par, if not beyond, anything PFH has done, and I cannot stress what praise that is to me.