Hmm, I only read the first 3. My room mate at college bought them and I spent a whole day or two reading them.
Wow, it has been 10 years since then. I can't believe it.
I definitely recommend that you read the rest. They are great books.
I think the only one I actually had to wait for was the 7th one. Wait, wow I knew I was young, but I wasn't even ten when I began reading these. Wow, I knew it was a while, but I didn't think it was that long.
Wow, that IS really young. Isn't it weird how long it's been? The first book came out 13 years ago in the UK, and the last book came out exactly 10 years after that. Craziness.
I had to wait for the last four books.
Goblet of Fire came out before I used the internet, but after that I avoided the internet like the PLAGUE whenever a new book was coming out. I heard too many stories of people just getting online to check their email the day the books came out and becoming bombarded with spoilers, especially for
Half-Blood Prince and
Deathly Hallows.
I read all the books within 5 hours or less, and as soon as I was done with HBP I went on my blogging site and, sure enough, on the front page in all caps there was
"SNAPE KILLS DUMBLEDORE ON PAGE [insert #]" from a popular blog. He had gotten so many hate comments "OMG you ruined the book for me! I hate you!" and I thought yeah, he's a real jackass for doing that, but come on now. People should have known better and stayed offline. Or at least stayed off of blogging sites and Facebook before they had finished reading the book. Sheesh.