Harry and John Potter: Year 2

Having thwarted a plot for the most powerful dark wizard of all time to be allowed to return, Harry, his brother John and cousin Delilah hoped to return to Hogwarts with Ron and Hermione and have a normal year. So naturally, a sixty foot snake is set loose and Azkaban loses one of its most infamous residents. T because John and Ron swear like sailors. Best read after year 1.