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 によって themselvs. no offense to あなた its them thats missing out

Tell them that once they embrace HP, it is like eating a large チョコレート sundae while their significant other gives them a back massage and ユニコーン dance above rainbows purely for their entertainment. That should at least get them intrigued enough to figure out why あなた would say such a thing. Then hopefully they will discover their own 愛 for HP.

go around and start a survey on wether ppl think hp is good または not and then (only if it works) 表示する them! adn あなた could also watch all the 映画 and 表示する them the 映画 first