The Quadwizard Tournament (A PJO, HOO, & HP crossover)
When Chiron sends Percy, Annabeth, Jason, Piper, Frank, Hazel, Leo, Nico and Thalia to compete in the Quadwizard Tournament, things did not go as well as they expected. Are the demigods capable of protecting Harry Potter and surviving the quest themselves? What will they do when a sinister figure comes back from the d...