In case if you are wondering how to surprise a Potterhead on their birthday, here is your perfect solution. The Harry Potter Book Cake is a Potterhead’s ultimate dream. This wonderful cake is just as delicious as it looks, if not more. The entire cake is filled with titbits of Harry Potter, and honestly, a fan could not ask for anything more. The delicious cake deserves all your money for driving the Potterhead crazy, but the cake is super pocket-friendly. Also, you could customize its size as per the requirement of your guest list.