Neologism…wow, that makes “made-up word” sound so profound. 
By picture books do you mean kids’ books that are long on pictures, short on text? Is there an exact definition or does it matter?
When Jessie Came Across the Sea by Amy Hest has been one of my favourites for a long time, and Trina Schart-Hyman’s (can’t remember how to spell her last name) illustrations for Snow White. (Hate the fairy tale, love the illustrations.
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I have had enough The Little Engine that Could and Are You My Mother? to last my lifetime thrice over, thanks very much.^^