Goodnight Moon combines very short length, repetitive format, relatively straight-forward subject matter choice, and a cross-cultural emotional goal. Maybe the

Goodnight Moon combines very short length, repetitive format, relatively straight-forward subject matter choice, and a cross-cultural emotional goal. Maybe the book that would have been written wouldn't be word-for-word the same, but if there wasn't Goodnight Moon someone would have written something nearly indistinguishable.