!["Oink" interior original art etching](https://kerlan.umn.edu/wp-content/uploads/2021/07/Oink-interior-original-art-etching-1024x899.jpg)
“Oink” by Arthur Geisert was illustrated with etchings — a rarely used technique in children’s books. The colors were done with manual color separation. Geisert tried to combine a classic etching style inspired by Piranesi, Rembrandt, and Callot with humor and narrative.