in the end Percy's cyclops brother goes under sea to help his dad prepare for war and Percy gets introduced to Thalia who is Zeus's daughter also she was the tree on top of the hill
Rick Riordan
rick riordan
Rick Riordan.
It is "The Sea of Monsters"
Rick Riordan.
fantasy or mythical
Polyphemus
Rick Riordan
Yes they have it's called Sea of Monsters you should read it sometime.
Windlass
Why don't you read and find out
"The Sea of Monsters" is the second book in the "Percy Jackson & the Olympians" series by Rick Riordan. It was published in 2006.