Star Wars Book of Sith: Secrets from the Dark Side [Vault Edition]
Darth was a title given to the Dark Lords of the Sith Order, which preceded a moniker different.
Star Wars Book of Sith Secrets from the Dark Side
I thought Luke was the jedi who returned because all the other jedi had died, but Luke became a jedi and so the jedi were restored. Luke and Vader BOTH returned. Because "Jedi" can be plural.
Star Wars: Episode III - Revenge of the Sith - After three years of fighting in the Clone Wars, Anakin Skywalker falls prey to the Sith Lord's lies and makes an enemy of the Jedi and those he loves, concluding his journey to the Dark Side.