How do I get to the other ages?

[peteham]

Once again lost!

I have finished the Voltaic age. and Iâ´ve returned. Now the Voltaic book seems to block the possibility of going to the other ages. What must I do after my return to the island?

[peteham]

Once again lost!

I have finished the Voltaic age. and Iâ´ve returned. Now the Voltaic book seems to block the possibility of going to the other ages. What must I do after my return to the island?

[Heuris]

Ahh, but there are other tusks!