THE BOOK from Stories for Nighttime and Some for the Day by Ben Loory.
"THE WOMAN RETURNS FROM THE STORE WITH AN armload of books. She reads them quickly, one by one, over the course of the next few weeks. But when she opens the last one, the woman frowns in surprise. All the pages in the book are blank. Every single one. The woman takes the book back to the store, but the manager won’t let her return it. Right there on the cover, the manager says, This book has no words and is non-returnable."
https://www.instagram.com/p/Cf61DnhO1NL/?utm_source=ig_web_copy_link
Sakura Pigma Micron pen and DR PH Martin Radiant Concentrated Watercolors. One side was painted, then embellished with ink, scanned into Photoshop, copied, flipped and pasted to make the two sides. (Fairly large image, so I included a couple of details.) Silly but fun to do. A little "acid" and a few hours of gazing is all you need for a profound experience. Ask me how I know.
I modified the challenge a wee bit. I didn't use the same paper for the various drawings since I was using (top row, left to right) hard graphite pencils (3H to HB), watercolor pencils, (bottom row, left to right) brush pens and ballpoint pen. These media work best on very different paper textures and moisture absorbing qualities. The second picture shows the object of my study --- and the apparatus I use to hold botanical subjects. "Third hand" tools are very useful and cheap. This one was under $10 and serves my purposes well. Just FYI. (Each drawing/painting was scanned and composited in Photoshop.)