There aren't many joys in life that can compare to a tasty Harry Potter theory, which is why I was so excited when my colleague (and fellow Potter nerd) Hemal Jhaveri told me there was a new one ...

Hold on to your sorting hats, Muggles, because this Harry Potter fan theory might throw you for a loop. Remember Crookshanks, Hermione Granger's sassy orange cat? He may be pretty important. Fans have ...