Rick Riordan is an American author. This is the fourth Percy Jackson book.
The main character is Percy Jackson the son of a Greek god Poseidon. His mum is normal though.
His half brother is a Cyclops named Tyson. His friends are a satyr called Grover and a daughter of Athena named Annabeth.
Take all the things you know about Ancient Greece and paste them in modern-day New York and you've got the setting for the book eg Mount Olympus is the Empire State Building.
After blowing up his school, Percy goes to live in Camp Half Blood, a camp for kids who are a half god and half mortal.
But things aren't good there. His enemy Luke is looking for a way to invade the camp via an ancient labyrinth and if he succeeds, thousands of bloodthirsty monsters will attack.
So Percy and his friends set off into the terrifying underground.
The smart ideas.
Any weak bits?
None of it will make sense if you haven't read any of the other books.
This book is really good. Our fave bits include the part where they found Daedalus who turned out to be someone they knew very well.
And also when the dark lord Kronos rises.
This is a great book if you're off on a long journey during the summer holiday and need something to make the time fly.
This reviews page is now closed. Here are some of the reviews you sent in.
"LOVE IT! The suspense made me want to keep reading and reading. I read it all the first day I got it. Two thumbs up!"
Ellen, 12, USA
"It's a very good read for people that like history, and is suitable for most ages because it's funny and interesting. And with all the ancient monsters and gods, in our modern day world it's interesting to see what they act like and do every day. Not to mention the exciting battles and bumps along the way. A very good book."
Leone, 14, New Zealand
"It is totally wicked! My fave bit is the battle at the end!"
Harry, 12, Isle of Man
"I just finished the book yesterday and loved it!!! It was such an action and fear-packed book!! This is a book that just can't be missed! The fantasy and magic give great plot lines!"
Arnav, 12, London, England
"I loved this book! Rick Riordan is a brilliant writer. I love the Percy Jackson series and I can't wait until the next one comes out!"
Freya, 11, Devon, England
"It's an OK book but I find Percy Jackson and the Titan's Curse much better. I think Rick Riordan didn't put as much in the book than the other books. 3 out of 5."
Rohan, 9, London, England
"I love all the Percy Jackson books. I think they're quite similar to the Harry Potter books and just as thrilling and exciting."
Cait, 11, Edinburgh, Scotland
"BRILL-I-ANT! Absolute 5/5 from me. But now there's only one book left!"
Lizzie, 11, Newcastle, England
"This is a GREAT book. Rick Riordan is a master at combining twists, comedy and adventure all together! I can't wait till the next book!"
Clarisse, 11, Los Angeles, USA
"I thought that this book was the best one in the series! I thought it had a very clever plot and was very exciting. More!"
Hannah, 13, Newcastle, England
"Percy Jackson and the Battle of the Labyrinth is an amazing book - the characters are great and I just couldn't put it down! I love the way Rick Riordan makes a book that sounds so unrealistic, so believable!"
Izzy, 13, Birmingham, England
"It's just as funny, witty, and suspenseful as the other books! I totally recommend it!"
Mary, 13, USA
"It is the best yet in the Percy Jackson series, which is saying something considering the standards that were set by the first three books. The plot was brilliant and the twists and turns had me hooked. I cannot wait until the next book!!!"
Katie, 12, Dumfries and Galloway, Scotland
"This is a good book but not as exciting and compelling as the rest of the series, as only the Camp's future is mentioned, although everyone will be affected if they do not succeed - this is not mentioned, so makes the book seem duller and the quest less urgent."
Emma, 12, Gateshead, England
"It's the best book ever; I completely disagree about the fact it is rated 4/5 - it's a DEFINITE 5/5 from me!"
Sophie, 11, Watford, England