I read The Mark of Athena by Rick Riordan. I think the most important part of the book is when the Greeks meet the Romans because it did or didn’t start a war between the Greeks and Romans. I also think that was important because it’s what starts the prophecy to save the world from the earth goddess Gaea waking. The book is full of action, fantasy,secrets and mystery. The book is part of a series and the series is the best series I’ve ever read: The Heroes of Olympus.