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Kingsport Bill is a tome found in the first act of Diablo III. It is needed to complete the achievement A Quick Study and can be obtained after recruiting Lyndon and listening to his conversation "Lyndon's Origins".

It reads as follows:

"Wanted: one relic, scarlet, roughly the size of a man's fist.
It was stolen two months past during a deplorable theft from the Merchants Guild Bank. Those apprehended were not in possession of the item. The relic is greatly missed by its rightful owner, who offers a reward for its safe return."