According to a quick internet data mining there are 6 Black Rock Ledger pages : 4, ,8, 15, 16 , 23 and 42.
This pages are found in act II (all difficulties I guess) in the desert zones before Alcarnus where random dungeons can spam. A random page is dropped by a miner near a wrecked ship (in the desert !) after he explodes ; you need to speak to him to start the event, beware of other exploding goblins, especially if you play hardcore....
These pages are non-tradable but I think that you can drop them on the ground for other people to grab.
(So far, I've collected four of them).
Here are my questions :
- could the number of pages (6) be confirmed ?
- what are they supposed to be used to ?
Any hints ?
PS : It reminds me of a WOW quest where you had to compile several parts of a map to launch aspecific pirates' chest quest.