For the bounty/event, see The Miser's Will.
Miser's Will is a tome in Act V of Diablo III. It can be found in the Miser's Hovel in Westmarch Commons.
It reads as follows:
To my sniveling offspring: if you are reading this, then I am dead and you have come to claim my fortune. Well, you still can't have it! I have set traps to stop you from even trying. So, enjoy the rest of your poor, miserable, and cowardly lives.
Gozek