You'll be teleported in front of the gate of Candlekeep.
Give the book to the guard and head for the Big central building.
Up to level3 (save)and fight The Iron Throne Boss.
After this you'll be imprisoned for his murder.But Someone will show you the way for the crypts.Inside the crypts look for some really interesting item in the tombs,but beware of the traps,use a Thief for disarm it and unlock the tombs .
Travel the crypt level (2levels)and one you're in the cave(3rd level) watch out for the 2 Grater Basilisk that have stoning abilities,then head for the lower left side of this map and get all the useful info from the guard.
Here ends chapter 6.