Heroes of Olympus, The Lost Hero

HI guys, 
The name of my book is Heroes of Olympus, The Lost Hero I have read all 551/551.
Here is a picture of the book: 

The protagonists in the book are Piper, Jason and Leo. Jason is supposedly handsome he has blond hair and blue eyes. He is one of the main characters in the book, he is the son of Jupiter/Zeus. He is smart, caring, he is a very good sword fighter and he doesn't like mean kids at all, also he feels the need all the time that his friends are his responsibility in case they get injured.   Piper is very pretty, brown hair and her eyes are a mix of colors, it says that you can't tell which color her eyes are. She is also a main character she is the daughter of Aphrodite. She is a bit self self conscious ( which is weird since she is a child of Aphrodite) she is smart, cool, brave and determined. The last main Protagonist is Leo, he is sort of scruffy looking brown curly hair and I think brown eyes. He is also a main character, he is the child of Hephaestus. He can build any thing on the spot so he is a amazing mechanic ( makes sense because he is the sun of Hephaestus), he is very funny, great sense of humor, he feels left out all the time and he is organized ( sort of). 

The antagonist is the giant who takes Pipers dad and wants to kill them. Many people/monsters in the book work for him and he works for his mom Gaia. The giant is big, ugly and he is not very intelligent but intelligent enough to put them in a trap. 

ANKA