Heroes of Olympus, The Book Three: Mark of Athena, The-Heroes of Olympus, The Book Three by Rick Riordan

In this thrilling continuation of the Heroes of Olympus series, the seven demigods of the prophecy—Percy Jackson, Annabeth Chase, Jason Grace, Piper McLean, Leo Valdez, Hazel Levesque, and Frank Zhang—are now united. They set sail on the Argo II to the ancient lands of Rome, on a quest to find and free the goddess Hera, who is being held captive by the giants. The journey is fraught with danger, both from mythical creatures and from within their own ranks. Annabeth is particularly focused on finding the ancient Roman camp, which is crucial for the success of their mission. As they struggle with their own personal challenges and the looming threat of war, the heroes must learn to trust each other and overcome their differences.