Not zentangle exactly, but this idea might appeal to those who love to tangle and doodle. It's done on a book page, bordering a section of text, and the highlighted words inside the main area make up a bit of verse. A creative idea.
From the blog, "No Matter Where I go...I ALWAYS Meet Myself There!" Found poetry. Zentangling/doodling on pages from Shakespeare's Complete Works. Several examples shown in post. Great idea for found poetry and art journaling.