Mark of Athena

I am reading the book Mark of Athena by Rick Riordan. It has 574 pages. It is a series book. This is the 3rd book of the Heroes of Olympus. This book takes place in the modern world but is mixed in by ancient Greek Gods and Goddesses. The story takes place in Rome, Italy in the beginning. It is a story about the demigods (Annabeth Chase, Leo, Piper and Jason from the Greek camp) go to the roman camp because there is prophecy and they half to go on a quest.  The mood for this book is adventurous because even you could feel that you are in the book and being with the characters.