Harry Potter and the Book of Titan

Harry has started his 3rd Year and the serial killer Sirius Black is at large and might be trying to come after Harry. There is a rumor just like last year that there is something secret and sacred in Hogwarts that Sirius Black is trying to get for Lord Voldemort. Will Hogwarts be protected or will Sirius be able to get into Hogwarts and do the Dark Lord's bidding once and for all.