HELP: waking dreams chapter 6

[LaProfe]

Im stuck in the black book "waking dreams" chapter 6...
I already killed everything and read the words,
but the dragon doesn´t appear

;__;

[smr1957]

First thing to try if you have not already, is to load an earlier save, and see if that works.

Also, there is this, which provides a complete walkthrough of At the Summit of Apocrypha, plus a list of known bugs and their solutions (note, however there may be spoilers, though if you have advance this far, they are relatively minor):
https://en.uesp.net/wiki/Skyrim:At_the_Summit_of_Apocrypha