I really like the tabs, they make locating scriptures a breeze, but for some reason the book of Isaiah was missing. I don't know if it's not in the Catholic bible or if it was a bad set of tabs. I ordered two more sets as the color coding make these a bright addition to any bible. I hope the book of Isaiah is in the new sets. If not, I will just use one of the blank tabs to mark it. It was the only book I couldn't locate, so I just remember it's Isaiah when I see the blank tab. Not perfect, but still a great addition to my bible. My version of the bible is the NKJV, so just be warned.