DISCLAIMER: Your Steps and Tasks may be different
Characters that were created after Patch Version 1.79 do not receive this Epic quest.
Per live patch first week in Oct and Nov:
Legend of the Lake and Barbaric Tales: Players couldn't turn in the second goblin tome - this has been fixed, they can turn it in now.
Sir Verin is outside the gates to Swanton Keep in North Black Mountaints.
He asks you to get 2 halves of a book of knowledge from the named goblins, Ulfwag and Grilk.
Ulfwag can be found in a goblin fort south of Swanton Keep and north west of Snowdonia Station location 18086 28069
Grilk can be found in an abandoned house. To get there, go to the lone guard tower along the path to Snowdonia Fortress. This is north of the twin guard towers past the bridge that connects South Black Mountains to North Black Mountains. From the lone guard tower, head west by southwest and you shall climb a tall mountain, with roaming goblins. Look around for an abandoned house. Loc 4.4k, 5.5k. (For all who know where Tepok's Mine is, it is southwest of it). After you give both halves to Sir Verin, you have to return to Lady Nimue.
When your return to Lady Nimue, she will award you experience and and an item. These are rewards for completion of Legend of the Lake, but listed for your convenience.