Oh my goodness, Apollo, you strange and beautiful basket case. I was laughing all through this book, marking pages to shove at my friends... You know the drill. The Greek-mythology-centric Percy Jackson series as a whole helped me through some dark times when I was younger, and this first book of Rick Riordan's new "Trials of Apollo" series is delightful, just as I remember "The Lightning Thief" to have been back when I really, really needed it. (It's only missing Mr. D -- I've always especially liked Mr. D. Maybe he'll show up in the next one?)
Anyway. You know how in Greek folklore, Apollo gets stripped of his powers sometimes when he gets his king/dad, Zeus, angry? That's happened again in this series, only now it's all happening in modern day New York... Where the rules to everything are way different than what Apollo's used to... Annnnd he's not used to acne or helplessness, either, both of which he has to deal with as an awkward teen apparently named "Lester." It's the sparkly god of the sun/music/so many things's turn to go on actual quests again instead of waving demigods off on them... And he's very, very sad about it.
Some familiar faces from the Percy Jackson series have appeared so far in "The Hidden Oracle," but I would say it's definitely its own series with unique sources of pathos. Something I always loved about the Percy Jackson books is their empathy, the way people can redeem themselves, the way characters can still be heroic despite/because of their flaws... And that is STILL HERE, operating now through the protagonist, given the centuries worth of mistakes a now-human Apollo has to grapple with. I definitely liked "Magnus Chase and the Gods of Asgard: The Sword of Summer" -- the Riordan book that came out a bit before this one -- but it didn't click with me in nearly the same way as Apollo's shenanigans. "The Hidden Oracle" felt like a fresh and self-aware remix of old ideas and settings from Percy Jackson, all told through a recently fallen god's wonderful, WONDERFUL narration. Yes, if you want something completely different than Percy Jackson this might not be the best place to look. But if you want to see the Percy Jackson universe through refreshingly new and oh-so-Olympus-y eyes, this may be perfect for you!
To sort of sum things up: I think this is a great kids' book, engaging and fast-paced and written with a light and goofy sense of humor, just like those original Percy Jackson books. (Sometimes the humor does get VERY goofy, so go in warned, but other times it's clever and tongue-in-cheek. Funny guy, that Apollo. Versatile.) Beyond that, though, I...a grown adult...am 100% buying the next book for myself just as soon as it comes out. I know that doesn't necessarily mean EVERY mythology-loving adult equipped with a suitably goofy sense of humor would also enjoy this book, but I know for a fact plenty of others have the same plan.