The House of Hades
newest book of the heroes of olympus series
The plot is that this group of friends that always save the world are facing a bigger problem. they are all demigods. well they all have to face the Earth goddess named Gaea whose is rising on august 1st. but they first need to save the two main characters Annabetth and Percy whose fell to tarturase. they planned to meet at the doors of death killing all monsters there to shut the doors so that gaea wont rise from the dead.