Received from: David [New Ashos] (M23:8)
You will receive this task together with [One For The Books], after completing [A Book Like No Other].
Timothy is no longer at the University, but he's still in town, sitting on a bench (M23:22). Go there and talk with him. Depending on which dialogue option you choose, the mission can end in two ways.
If you order him to give the book back right now ("Give it back."), Timmy will reach his for a pocket teleport and disappear. You won't be able to get the book back - return to David (M23:8) and tell him the bad news.
If you think Timmy is lying (tell him to not even move a finger), you will learn that the book is hidden below rocks on the edge of town. You won't have to look far, but once there (M23:23) you will greeted by a welcoming party consisting of a panther and two Necrises. Pick up the book and bring it to David (M23:8).
Received from: George [New Ashos] (M23:17)
You will be able to take on this mission only after completing [Into The Lion's Mouth]. George will then exit the casino and will be standing by the entrance.
The man will tell you that his niece has been brutally beaten and wanted to poison herself. George wants to take revenge and kill count Lester.
You decide to help him in killing Lester -he'll give you the poison.
You will unlock [A Vintage Bottle].
You decide not to help him - George will go kill the bastard himself.
SOLUTION 2 - ENDING 1
You can follow the man to the picnic (M23:18). Once George begins to fight the guards, you can help him kill them and then Lester himself.
You will receive a reward of 990 auras.
SOLUTION 2 - ENDING 2
You don't need to follow Georg to the picnic - you can however get there later or follow him and don't help him fight the guards.
Once George dies, attack Lester and the guards.
You will unlock [The Avenger].