How did bookporn not post this?
WHAT SORCERY IS THIS
I KNEW THOSE GOLDEN PARTS WERE HIDING SOMETHING. I JUST KNEW IT.
since this has so many notes and I’m a nerd, I’ll contribute some knoweldge. this is called a fanned (single) fore-edge painting; it’s made with a special press that holds the pages fanned out so the scene can be painted. there are also doube- and triple- fore-edge paintings where fanning the pages in a different way reveals a different scene. here is a gallery of fore-edge paintings from the boston public library. and there are still some artists who are fore-edge painting experts who hold workshops from time to time to teach it!