Excelsior

Book says kill trolls for the quest, found in Despise.
Killed at least 20, noticed I had not completed, clicked book, and still had 20 to kill
Relogged
Left area, came back, went to multiple troll spawns on the Troll/Ogre floor, with no luck

try to collect the corpses with the collect button

I did

Can you say which quest this is.. i've never done such quest to kill trolls... i'd go try it out and find out

At the bottom of the gump, in red lettering, it says “repeatable in 7 hours 49 min” - I am thinking you need to wait to complete again