I just registered and don't have the guide book yet but managed to make it through Fort Emergence and then to the surface. Took care of stuff in Krizsan, Inn of Blades, Slivar, Colchis, Delan, Delis, Pergies, Agate Tower.
I'm SE of Colcis and found the mountain (after battling slimes), but when I get to the top I get the message 'You've reached the end of the valley.... maybe there's information you can find elsewhere that would help you here.'
What did I forget to do?