What an excellent way to end the series, action packed, fun, and an emotional roller coaster. This series had its pitfalls - especially the latter half - and by this last one the author felt more like they were writing A Series of Unfortunate Events instead of Artemis Fowl but hey, even so, I had a good time and I'm glad to have read this series.

final thoughts: nostalgic to go back to this series and pick up where I left off as a kid. series is overall fun and entertaining, but grating/eyeroll-worthy in parts. this was not helped by nathaniel parker's racist "asian" voice for opal on the audiobook. 
still, the characters form meaningful bonds and there's suitably emotional payoff.