First let me say welcome! As to your question, whenever we unlock one of the locks on the Book (we’ve unlocked two of the four so far), the Book presents us with a couple of lovely pages. For about a week or so, those pages are visible on the Book of Briars website (they’ll appear to be sticking up out of the closed book and you can click on them). however, after that time they disappear. I think you can still access them by passing the magimystic assessment for that Lock, but the only other way to see them is if they’ve been posted in the forums.
Don’t let that discourage you. There’s a metric ton of information out there, but you don’t have to know any of it. We just received our first clues for the next fragment (the very beginning of opening the 3rd Lock) so this is a perfect time to dive on in. I recommend heading to this thread here to catch up on where we’re at.
And always feel free to ask questions. The Mountaineers are some seriously rad people and love to help new Recruits. Have fun!