The Living Dead Experiments

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.

Somewhere in the middle of America, the government has been doing experiments on the dead. Bringing them back from the dead to see if their brains can still function. Can they form words to speak? Can they do simple math like addition or something more complex like multiplication? Can they still sleep? Can they take orders? Or, Do they give the orders?