Another 5* from Celyn. 
 I read this book to her out of order, having read book 1 then book 3 before it. I hate it when people do that, but the books are pretty stand-alone and we picked the wrong one when leaving the house in a hurry. 
 Actually I can now better appreciate the cross-book story and it's quite clever, so that's good. 
 This volume continues the mix of Greek myth, modern America, and teenagers. Percy battles through various monsters in bloodless battles where the beasties turn to mist on their deaths and reform years later. We're introduced to his half-brother, a cyclops, and a quest is launched to thwart the dastardly plan to destroy Camp Half-Blood. Various famed nasties are encountered including (& here I'm not going to google the correct spelling) Lastrigonian giants, Stymphalian birds, Charybdis and Scylla, Circe, and Polyphemus. Hermes pops up too. 
 It's all rowdy and fairly random fun raiding not only Greek myth but other periods of history to give us a Civil War gunboat and some famous pirates to boot. 
 The twist is actually a clever one, neatly mirroring the villian's supposed victory with the heroes'. 
 Solid YA entertainment. 
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