Do you remember I posted an item called A Freakish Coincidence?
It was about how an artist (in this case me) might unconsciously replicate another person's composition.
Here is a less close example of a painting I did for East of the Sun and West of the Moon, and a similar composition from The Runaway Bunny written by Margaret Wise Brown and illustrated by Clement Hurd.
Looking at them together, they aren't so alike, but it often occurred to me whilst reading The Runaway Bunny to my kids that maybe I had seen this picture years earlier, and had stored the design somewhere in the back of my mind. The more likely answer is probably to do with there only being so many ways to lay out the essential elements over a two page spread, so that similar designs will sometimes spring up independently.
I have to say I think The Runaway Bunny is an awful book, but the author and illustrator really got it right with their classic Goodnight Moon.
Check out different approaches to East of the Sun and West of the Moon on the excellent Sur La Lune website.