What does a book event penalty do in Cannibal Island, and can you choose it?

Question

Accepted Answer

The penalty is fixed: move the camp if you can, otherwise lose the shelter, and with no shelter lose 2 health. The camp moves as soon as the book event resolves. The two extra wounds apply only when the camp cannot move or the shelter is lost, not on top of a forced camp move.

Robinson Crusoe: Adventures on the Cursed Island

What does a book event penalty do in Cannibal Island, and can you choose it?