If lost or destroyed, a new copy can be obtained from the bookcase in your Player-Owned House made through Construction.
Obtaining this text is a requirement for the Master quest cape. See Tips and Tricks to obtaining the Master Quest Cape for assistance obtaining the Master quest cape.
Below is the text you can read from within the book.
We can't leave. It's like the cavern exit was never there. There's just stone.
It's not a cave in though. There's no debris, no fallen rocks, there was no sudden rockslide. It's just GONE.
The guys are talking about ghosts and dark magic. Omnis appears unphased, he just tells us to keep digging, like it's business as usual. I do not trust him.
Saradomin protect us, there's something here. Archy has gone missing. We heard his scream, ear-splittingly loud and then suddenly muffled. But there's no sign of him nor a struggle, or where he could be. Just the same featureless walls and the horrible shadows cast by torchlight.
I keep thinking I see something out of the corner of my eye. Something slithering along the floor. It's like someone is dragging bandages through the dirt, but there's no one pulling them. I've got to get out of here.
Omnis has vanished as well. No scream this time, he's just gone. I can't say I'm choked up by that one, the guy was creepy. In the last few days he's taken to muttering in a strange language in the corner. I swear he said the word ripper periodically, but it's probably just my mind playing tricks.
It reminds me of the demon that my father used to tell me about. The ripper demon that Saint Elspeth defeated with music.
I wish I wasn't tone deaf.