Because they are really good.
Many people who read Harry Potter books find it quite addictive, yes.
I have read all seven Harry Potter books.
Over four million people have been sold a harry potter book
None, all the Harry Potter books have been released.
There are approximately 554 owl in all the books of harry potter
They don't. Many people like them, others don't.
By 2008 over 400 million Harry Potter books were sold.
an estimated 11 million-12 Million people
J.K Rowling gives many interviews which can be found online. The information is also posted on places such as the Harry Potter Lexicon and Harry Potter Wikia.
There are 7 books. 1. Harry Potter and the Philosopher's Stone 2. Harry Potter and the Chamber of Secrets 3. Harry Potter and the Prisoner of Azkaban 4. Harry Potter and the Goblet of Fire 5. Harry Potter and the Order of Phoenix 6. Harry Potter and the Half Blood Prince 7. Harry Potter and the Deathly Hallows
There are seven Harry Potter books. They were all written by the same author and all belong in the same genre.
934,768 harry potter books are sold monthly the most ever sold daily is about 2,075