Interesting, informative. Includes a very good story about a slave labor camp. Book 3 is mostly military strategy. I have listened to this twice and picked up more the 2nd time. Will probably listen a third time, because there were still things I missed.
Book 1 still the best in the series.
Book 3 interesting and informative, but unrealistic timeline and fairy tale happy ending.
I recommend Book 3 for entertainment value and to learn how other people think and plan.