The mark of Athena : the graphic novel / by Rick Riordan ; adapted by Robert Venditti ; art by Orpheus Collar ; lettering by Chris Dickey. [Boundless electronic resource]
Uniting with Jason, Piper, and Leo after their dangerous quest, Percy, Hazel, and Frank wonder who will be chosen to fulfill the Prophecy of Seven, completing their group's number, and sail with them to an ancient land to find the mysterious Doors of Death.