I also recommend them, they are great. Some things that i especially like is the connection between the two main characters, the books giving you a very believable idea on how dragon-based warfare could work and showing different ways various cultures interact with dragons. While the major european powers mostly stick to the air force part mentioned in my earlier comment and generally don’t interact with people outside the military much, china for example has dragons more integrated into society and holding a wider variety of jobs. Book 4 showed a lot about dragons in southern africa, though i won’t spoil the specifics.
I have completed book 4 since my previous comment and am now deep into book 5.
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