how can i tell my sib how good hp is

talk about harry potter alot when he sit with u and i think he'll be intresting to read the book

give up your sibling is going to have to find out all by themselvs. no offense to you its them thats missing out

Tell them that once they embrace HP, it is like eating a large chocolate sundae while their significant other gives them a back massage and unicorns dance above rainbows purely for their entertainment. That should at least get them intrigued enough to figure out why you would say such a thing. Then hopefully they will discover their own love for HP.

go around and start a survey on wether ppl think hp is good or not and then (only if it works) show them! adn you could also watch all the movies and show them the movies first