i cant seem to do this quest 
and im stuck here...
Viewing post in The Forgotten Island comments
You can read the book in your inventory, in the section for important items.
As for the puzzle, I see you’ve already reached the chest. The puzzle is designed so that you either block your own exit (and get to the chest) or block the chest for yourself and move on.
Just take the second path — I’m sure you’ll figure it out