The Mark of Athena

Heroes of Olympus

Content Ratings

Moderate Romance

Percy and Annabeth's relationship is given real emotional and romantic depth in this volume; they share tender moments and the ending directly involves their relationship; content is sweet and emotionally sincere, with a kiss that carries significant weight.

Moderate Themes

Annabeth's solo quest confronts her deepest fears; the cliffhanger ending involves a devastating separation that carries genuine emotional weight for readers invested in the characters.

Moderate Violence

Large-scale battles, confrontations with giants and twin giants of chaos, and a cliffhanger ending involving two characters falling into Tartarus make this the most intense entry yet.

Synopsis

The Greek and Roman demigod crews finally unite aboard the Argo II and sail toward Rome on a mission to recover the Athena Parthenos before the giants can use it to destroy Olympus, while Annabeth faces a solo quest that has haunted her family for generations. A thrilling crossover entry that brings Percy and Annabeth's relationship to the forefront and ends on one of the series' most shocking cliffhangers.