Annabeth comes to Camp Jupiter and is scared to meet her boyfriend. Out of nowhere, Leo starts to fire out of his ship, the Argo II. Percy Jackson and his two friends escape to find the Mark of Athena. Percy, Jason, Hazel, Piper, Annabeth, Frank, and Leo, all demigods were chased by demigods, most importantly Octavian.
I like when Percy made Octavian shut up. I also like when Percy used the water to destroy the water tank, and when Frank became a dragon. Book 3 of The Heroes of Olympus series. [yayo]