I used tabs on my books so I wouldn’t have to consult a guide while reading because it would’ve taken me out of the story! So I tabbed the order of reading. Similar to the photo I googled. My friend is borrowing my copies lol

I saw someone post bookmarks for this tandem read. You get a bookmark for each one and it shows you what chapters to read. That way you don’t have to tab two fat books. I think the tabs look awful on the beautiful book, personal opinion