Get the Amos or Bic glue sticks. On my latest visit, this was all they had in stock. The clerk assured me the Impact glue sticks were the same as the rest, but upon actually using them, they do not stick anything. You can coat an A4 page in glue and put your hand on it and feel that it does not stick. Pages come loose immediately. Considering this glue stick only has one job, it miserably fails at it. Don't buy the impact ones.

Use it to stick pages in a book have to do it again a few days later as pages come loose.
Maybe a poor product design.