By J. K. Rowling
For twelve lengthy years, the dread castle of Azkaban held an notorious prisoner named Sirius Black. Convicted of killing 13 individuals with a unmarried curse, he was once stated to be the inheritor obvious to the darkish Lord, Voldemort, and can also have assisted within the deaths of James and Lily Potter—Harry Potter’s parents.
Now Black has escaped, leaving in simple terms clues as to the place he can be headed: Harry Potter's defeat of You-Know-Who was once Black's downfall to boot. And the Azkaban guards heard him muttering in his sleep, "He’s at Hogwarts... he’s at Hogwarts."
Of path, Harry already had lots to fret approximately. After inflating his nasty aunt and working away at the magical Knight Bus, he reveals he’s being pursued through demise omens at each flip. He gets brilliant presents: a among the best Firebolt broomstick, and the Marauder’s Map, a paranormal diagram of Hogwarts made via the mysterious “Moony, Wormtail, Padfoot, and Prongs.” Hermione disappears often, stressed down by way of a doubtless very unlikely direction agenda. And the soulless Dementors have come to protect Hogwarts—supposedly to guard Harry from Sirius Black, yet they terrify Harry greater than the fugitive ever could.
To improve himself opposed to them, Harry reaches out to Remus Lupin, the security opposed to the darkish Arts instructor who used to be a chum of his father’s. Lupin teaches Harry concerning the Patronus allure, a shielding degree good above the extent of magic quite often mastered via wizards Harry’s age. yet despite his broom, his map, his magic, and his dependable buddies, Harry isn't safe.
Because on most sensible of every little thing else, there’s a traitor hidden at Hogwarts...