Good Night Moon

Each night as we start Cole's bedtime routine, we tell him to go pick out some books. His stack almost always contains "Trucks" and "Good Night Moon". The last three nights while reading Good Night Moon, Cole has started crying. At first we thought something in the pictures must be scaring him but we couldn't figure out what was so scary about the book. We then realized it was the words "good night". We can read the book just fine if we change the words "good night" to "sweet dreams". But... as soon as you sneak in "good night", Cole starts crying.