Side by Side: Five Favorite Picture-Book Teams Go to Work - Leonard S. Marcus - Google Books

https://books.google.de/books?id=HdOsqRAZmycC&pg=PA19#v=onepage

Have you ever wondered how a picture book is made? The process is similar to the way we play a team sport, put on a play, or build a sandcastle-through collaboration. Writers and illustrators collaborate in a variety of ways. Sometimes they start as…