I believe it is hinted at in book 4 Battle Of The Labrinth. But for sure is it known at the end of book 5 The Last Olympian. (sorry if anythings spelled wrong)
His wristwatch that spiraled into a shield when Percy slapped it.
There was a costume item on the ad-game for "Percy Jackson and the Olympians", in July 2010. This was a different version of Zeus and his lightning staff than on Mythology island.
Hades had a helmet of invisibility and he could control the underworld. He also can bring someone back from the dead, for a price of course.
The bead from the third Percy Jackson book, "The Titan's Curse," is golden in color with small letters etched into its surface that read "Daedalus." It is a powerful magical item that serves as a symbol of the character's involvement with the quest to rescue Artemis and stop the rise of the Titan's army.
The microwave oven
Michael Jackson
If Percy will recover Ares' shield from a theme park, Ares will give him transportation, information, and food
At Camp Half-Blood, Percy Jackson faces the initiation rite of being claimed by his godly parent. This occurs during the camp's orientation when he is introduced to the other demigods and participates in various activities. His claim becomes evident when he receives a magical item, signifying his lineage and role within the camp, solidifying his identity as a demigod and his connection to the world of Greek mythology.
the main problem is that zues's master bolt has been stolen and he blames it on posidions sun Percy. Percy has to retrive the master bolt and prove himself to the Gods. The other main problem is that Percy relizes he is a demi-god.
He said it was his fedora hat. Aka his "Spy Hat"
Ares backed off from the fight with Percy because he realized Percy had the potential to be a powerful demigod and did not want to harm him unnecessarily. Additionally, Ares had no interest in a prolonged fight if Percy was not willing to give up the bolt, as his main goal was to retrieve the stolen item.
Someone can become involved in an auction by either selling an item or buying an item. To check for auctions, one can check the newspaper for upcoming auctions.