It was a little kid's book called "Chickens! Kids look and learn series" It also said that there was a chicken that laid 7 eggs in one day, that a chicken will lay bigger and stronger eggs if we adjust the lighting in their cages to make them think that each day is 28 hours long instead of 24, that chicks begin to develop at 86 degrees, and that chickens will be less flighty if their caretakers walk backwards while tending the henhouse or coopWhich book? Because that's not true.
Here is a documented hybrid.
Note that turkeys don't have nearly as naked of heads as NN turkens do. NN's are bare, turkeys (females at least) have feathers all the way up their head.
Source
Example of a male turkey's head
Now an example of a female turkey's head:
Looks nothing like the NN turkens to me.