Note: this is a review for the series posted to each book.
I read this series for the first time in 2021, when I was fully an adult, and unlike a lot of other work aimed at younger audiences, I found it held up well without requiring any nostalgia from my childhood. All five books are solid romps, with lots of fun quests and so many different mythological characters sprinkled in. The shifting of Olympus with the centre of culture is an interesting (if slightly imperialistic) idea, and the modernization of ancient stories and themes is neat. I like Percy and his friends and they are easy to root for. Some of the love triangle stuff is a bit overdone and drawn out (and painfully hetero) but I don't object to the romances generally. Overall, an enjoyable magical middlegrade series and I plan to read more of extended universe of books.