I read this book in one sitting!
The first and second books were very good, and caught my interest. I was able to get the rest of the series on Kindle Prime. This 6th book in the series has gotten hooked and lead me to wish I could have found the means to study physics instead of business administration when I was in college. Studying physics is now a "hobby", and Stephen Arseneault has done his research. I and reading these books on my Kindle, and checking references available online. Good for general sci-fi, but some of the stuff in these books is possible. Seems that Elon Musk is one of the few people who believe it!