Though the words "Harry Potter" are never mentioned, the allusions are unmistakable. One section features a magical train hidden between platforms at King's Cross station which leads to a magical school. The Antichrist character has a hidden scar and a mentor named Riddle. (Lord Voldemort, born Tom Riddle, is Harry Potter's arch enemy in the Potter series.) Characters resembling both Ron Weasley and Hermione Granger also appear and, at one point, the Potter character kills someone with a lightning bolt from his flaccid penis.
Clearly I need to get caught up on my LxG!