It's called a scotch ATG gun. Not sure where you can buy them as the one I used was loaned to me. But it was super easy to use and made covering the notebooks a breeze. I covered 40 notebook in about 35 minutes. But I tried a glue stick and it worked just as good.
You could cover them for school or work or to use as a journal. I only covered the front cover but you could also cover the back and the inside cover as well.