I volunteer at an elementary school library 8 hours a week. One of my jobs is to repair books, and as you can imagine, some of our books come back in rough shape from careless little students. I repair torn pages and torn book spines to increase the life of a book with Scotch shipping tape. It works great!
When I finish cataloging new books, I use this tape to attach spine labels, Accelerated Reader level stickers, and check out and in bar codes. It adheres firmly and keeps these important stickers protected.
My newest project is attaching vocabulary lists inside the front cover of many of our AR books. So we are definitely good customers of your tape, as I have already used 5 rolls this school year!