When Pottermore got started, this blog was a way for people who had not yet gotten their letters to take advantage of those who had. Now that Pottermore is open to the public, it's more of a glossary, a compendium of all the exclusive new content in Pottermore, all in one easy place.
You'd think I wouldn't need to say it, but if want to experience Pottermore for yourself without it being spoiled, DO NOT READ ON. Obviously.
None at all. Judging by how long it took to get Book 2, we may not get three until next summer. I use insider.pottermore.com to stay in the loop, they usually give about a week’s warning there before they post anything new.