The Mark of Athena

by Rick Riordan
Lexile:  690
Genre:  Fantasy

Annabeth and Percy have been apart long enough.  The quests and battles they have endured should have earned them some quiet time alone together.  But that is not to be.  Annabeth receives a startling message:  Follow the Mark of Athena.  Avenge me.  So the demigods are off again, trying to keep the evil powers at bay and make the world a better, safer place for everyone.